121122112221220 has 48 divisors (see below), whose sum is σ = 293802086124288. Its totient is φ = 41453557122560.

The previous prime is 121122112221163. The next prime is 121122112221233. The reversal of 121122112221220 is 22122211221121.

It is a super-2 number, since 2×121122112221220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121122112221191 and 121122112221200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16192792012 + ... + 16192799491.

It is an arithmetic number, because the mean of its divisors is an integer number (6120876794256).

Almost surely, 2^{121122112221220} is an apocalyptic number.

121122112221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121122112221220 is an abundant number, since it is smaller than the sum of its proper divisors (172679973903068).

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

121122112221220 is a wasteful number, since it uses less digits than its factorization.

121122112221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32385591540 (or 32385591538 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 121122112221220 its reverse (22122211221121), we get a palindrome (143244323442341).

The spelling of 121122112221220 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty".