121110021112020 has 48 divisors (see below), whose sum is σ = 339108640008768. Its totient is φ = 32295950306560.

The previous prime is 121110021111941. The next prime is 121110021112051. The reversal of 121110021112020 is 20211120011121.

It is a happy number.

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

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, 43267840 + ... + 45981800.

It is an arithmetic number, because the mean of its divisors is an integer number (7064763333516).

Almost surely, 2^{121110021112020} is an apocalyptic number.

121110021112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110021112020 is an abundant number, since it is smaller than the sum of its proper divisors (217998618896748).

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

121110021112020 is a wasteful number, since it uses less digits than its factorization.

121110021112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457720 (or 3457718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121110021112020 its reverse (20211120011121), we get a palindrome (141321141123141).

The spelling of 121110021112020 in words is "one hundred twenty-one trillion, one hundred ten billion, twenty-one million, one hundred twelve thousand, twenty".