121122120220 has 24 divisors (see below), whose sum is σ = 265415429664. Its totient is φ = 46342376256.

The previous prime is 121122120143. The next prime is 121122120277. The reversal of 121122120220 is 22021221121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121122120194 and 121122120203.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 131654019 + ... + 131654938.

It is an arithmetic number, because the mean of its divisors is an integer number (11058976236).

Almost surely, 2^121122120220 is an apocalyptic number.

121122120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121122120220 is an abundant number, since it is smaller than the sum of its proper divisors (144293309444).

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

121122120220 is a wasteful number, since it uses less digits than its factorization.

121122120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263308989 (or 263308987 counting only the distinct ones).

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

Adding to 121122120220 its reverse (22021221121), we get a palindrome (143143341341).

The spelling of 121122120220 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty".