121220112020 has 48 divisors (see below), whose sum is σ = 290979537408. Its totient is φ = 41553857280.

The previous prime is 121220112007. The next prime is 121220112053. The reversal of 121220112020 is 20211022121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 121220111986 and 121220112004.

It is a congruent number.

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, 753080 + ... + 899760.

It is an arithmetic number, because the mean of its divisors is an integer number (6062073696).

Almost surely, 2^121220112020 is an apocalyptic number.

121220112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220112020 is an abundant number, since it is smaller than the sum of its proper divisors (169759425388).

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

121220112020 is a wasteful number, since it uses less digits than its factorization.

121220112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152600 (or 152598 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220112020 its reverse (20211022121), we get a palindrome (141431134141).

It can be divided in two parts, 1212201 and 12020, that added together give a palindrome (1224221).

The spelling of 121220112020 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, twenty".