1212111220020 has 24 divisors (see below), whose sum is σ = 3393911416224. Its totient is φ = 323229658656.

The previous prime is 1212111219911. The next prime is 1212111220039. The reversal of 1212111220020 is 200221112121.

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, 10100926774 + ... + 10100926893.

It is an arithmetic number, because the mean of its divisors is an integer number (141412975676).

Almost surely, 2^{1212111220020} is an apocalyptic number.

1212111220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212111220020 is an abundant number, since it is smaller than the sum of its proper divisors (2181800196204).

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

1212111220020 is a wasteful number, since it uses less digits than its factorization.

1212111220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201853679 (or 20201853677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212111220020 its reverse (200221112121), we get a palindrome (1412332332141).

The spelling of 1212111220020 in words is "one trillion, two hundred twelve billion, one hundred eleven million, two hundred twenty thousand, twenty".