1200020202120 has 64 divisors (see below), whose sum is σ = 3600507049920. Its totient is φ = 319965703424.

The previous prime is 1200020202109. The next prime is 1200020202221. The reversal of 1200020202120 is 212020200021.

It is a super-2 number, since 2×1200020202120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1200020202096 and 1200020202105.

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, 358039 + ... + 1590041.

It is an arithmetic number, because the mean of its divisors is an integer number (56257922655).

Almost surely, 2^{1200020202120} is an apocalyptic number.

1200020202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200020202120 is an abundant number, since it is smaller than the sum of its proper divisors (2400486847800).

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

1200020202120 is a wasteful number, since it uses less digits than its factorization.

1200020202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240134 (or 1240130 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1200020202120 its reverse (212020200021), we get a palindrome (1412040402141).

The spelling of 1200020202120 in words is "one trillion, two hundred billion, twenty million, two hundred two thousand, one hundred twenty".