121310032020 has 48 divisors (see below), whose sum is σ = 340198100928. Its totient is φ = 32298864640.

The previous prime is 121310032001. The next prime is 121310032027. The reversal of 121310032020 is 20230013121.

It is a super-2 number, since 2×121310032020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310032027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1538634 + ... + 1615553.

It is an arithmetic number, because the mean of its divisors is an integer number (7087460436).

Almost surely, 2^121310032020 is an apocalyptic number.

121310032020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121310032020 is an abundant number, since it is smaller than the sum of its proper divisors (218888068908).

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

121310032020 is a wasteful number, since it uses less digits than its factorization.

121310032020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154840 (or 3154838 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121310032020 its reverse (20230013121), we get a palindrome (141540045141).

The spelling of 121310032020 in words is "one hundred twenty-one billion, three hundred ten million, thirty-two thousand, twenty".