1213102020120 has 64 divisors (see below), whose sum is σ = 3853382893920. Its totient is φ = 304464820224.

The previous prime is 1213102020077. The next prime is 1213102020187. The reversal of 1213102020120 is 210202013121.

It is a super-2 number, since 2×1213102020120² (a number of 25 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1213102020120.

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, 297326887 + ... + 297330966.

Almost surely, 2^{1213102020120} is an apocalyptic number.

1213102020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213102020120 is an abundant number, since it is smaller than the sum of its proper divisors (2640280873800).

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

1213102020120 is a wasteful number, since it uses less digits than its factorization.

1213102020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594657884 (or 594657880 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1213102020120 its reverse (210202013121), we get a palindrome (1423304033241).

The spelling of 1213102020120 in words is "one trillion, two hundred thirteen billion, one hundred two million, twenty thousand, one hundred twenty".