1211202013020 has 24 divisors (see below), whose sum is σ = 3391365636624. Its totient is φ = 322987203456.

The previous prime is 1211202013003. The next prime is 1211202013037. The reversal of 1211202013020 is 203102021121.

It is an interprime number because it is at equal distance from previous prime (1211202013003) and next prime (1211202013037).

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 7 ways as a sum of consecutive naturals, for example, 10093350049 + ... + 10093350168.

It is an arithmetic number, because the mean of its divisors is an integer number (141306901526).

Almost surely, 2^{1211202013020} is an apocalyptic number.

1211202013020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211202013020 is an abundant number, since it is smaller than the sum of its proper divisors (2180163623604).

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

1211202013020 is a wasteful number, since it uses less digits than its factorization.

1211202013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20186700229 (or 20186700227 counting only the distinct ones).

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

Adding to 1211202013020 its reverse (203102021121), we get a palindrome (1414304034141).

The spelling of 1211202013020 in words is "one trillion, two hundred eleven billion, two hundred two million, thirteen thousand, twenty".