121121220122120 has 32 divisors (see below), whose sum is σ = 277664683869720. Its totient is φ = 47534365632000.

The previous prime is 121121220122117. The next prime is 121121220122179. The reversal of 121121220122120 is 21221022121121.

It can be written as a sum of positive squares in 4 ways, for example, as 103304497309924 + 17816722812196 = 10163882^2 + 4220986^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121121220122092 and 121121220122101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28566323381 + ... + 28566327620.

Almost surely, 2^{121121220122120} is an apocalyptic number.

121121220122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121220122120 is an abundant number, since it is smaller than the sum of its proper divisors (156543463747600).

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

121121220122120 is a wasteful number, since it uses less digits than its factorization.

121121220122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57132651065 (or 57132651061 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121121220122120 its reverse (21221022121121), we get a palindrome (142342242243241).

The spelling of 121121220122120 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty".