1121202120220 has 192 divisors, whose sum is σ = 2966466134016. Its totient is φ = 346478653440.

The previous prime is 1121202120133. The next prime is 1121202120223. The reversal of 1121202120220 is 220212021211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1121202120194 and 1121202120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121202120223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 37023685 + ... + 37053955.

It is an arithmetic number, because the mean of its divisors is an integer number (15450344448).

Almost surely, 2^{1121202120220} is an apocalyptic number.

1121202120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121202120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483233067008).

1121202120220 is an abundant number, since it is smaller than the sum of its proper divisors (1845264013796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121202120220 is a wasteful number, since it uses less digits than its factorization.

1121202120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30780 (or 30778 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1121202120220 its reverse (220212021211), we get a palindrome (1341414141431).

Subtracting from 1121202120220 its reverse (220212021211), we obtain a palindrome (900990099009).

The spelling of 1121202120220 in words is "one trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty thousand, two hundred twenty".