121310112020 has 96 divisors (see below), whose sum is σ = 269779894272. Its totient is φ = 45745920000.

The previous prime is 121310112013. The next prime is 121310112097. The reversal of 121310112020 is 20211013121.

It is a super-2 number, since 2×121310112020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121310111986 and 121310112004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19341485 + ... + 19347755.

It is an arithmetic number, because the mean of its divisors is an integer number (2810207232).

Almost surely, 2^121310112020 is an apocalyptic number.

121310112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121310112020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134889947136).

121310112020 is an abundant number, since it is smaller than the sum of its proper divisors (148469782252).

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

121310112020 is a wasteful number, since it uses less digits than its factorization.

121310112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113 (or 7111 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121310112020 its reverse (20211013121), we get a palindrome (141521125141).

The spelling of 121310112020 in words is "one hundred twenty-one billion, three hundred ten million, one hundred twelve thousand, twenty".