121120011020 has 24 divisors (see below), whose sum is σ = 256059090000. Its totient is φ = 48122848832.

The previous prime is 121120011013. The next prime is 121120011029. The reversal of 121120011020 is 20110021121.

It is a junction number, because it is equal to n+sod(n) for n = 121120010992 and 121120011010.

It is not an unprimeable number, because it can be changed into a prime (121120011029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20319170 + ... + 20325129.

It is an arithmetic number, because the mean of its divisors is an integer number (10669128750).

Almost surely, 2^121120011020 is an apocalyptic number.

121120011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120011020 is an abundant number, since it is smaller than the sum of its proper divisors (134939078980).

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

121120011020 is a wasteful number, since it uses less digits than its factorization.

121120011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40644457 (or 40644455 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121120011020 its reverse (20110021121), we get a palindrome (141230032141).

The spelling of 121120011020 in words is "one hundred twenty-one billion, one hundred twenty million, eleven thousand, twenty".