1121212022220 has 72 divisors (see below), whose sum is σ = 3401107478496. Its totient is φ = 298981285632.

The previous prime is 1121212022141. The next prime is 1121212022267. The reversal of 1121212022220 is 222202121211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1121212022193 and 1121212022202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8457769 + ... + 8589311.

It is an arithmetic number, because the mean of its divisors is an integer number (47237603868).

Almost surely, 2^{1121212022220} is an apocalyptic number.

1121212022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121212022220 is an abundant number, since it is smaller than the sum of its proper divisors (2279895456276).

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

1121212022220 is a wasteful number, since it uses less digits than its factorization.

1121212022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178911 (or 178906 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1121212022220 its reverse (222202121211), we get a palindrome (1343414143431).

The spelling of 1121212022220 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, twenty-two thousand, two hundred twenty".