1220120195836 has 12 divisors (see below), whose sum is σ = 2136442443912. Its totient is φ = 609708069008.

The previous prime is 1220120195779. The next prime is 1220120195837. The reversal of 1220120195836 is 6385910210221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120195837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87999430 + ... + 88013293.

It is an arithmetic number, because the mean of its divisors is an integer number (178036870326).

Almost surely, 2^{1220120195836} is an apocalyptic number.

It is an amenable number.

1220120195836 is a deficient number, since it is larger than the sum of its proper divisors (916322248076).

1220120195836 is a wasteful number, since it uses less digits than its factorization.

1220120195836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176014460 (or 176014458 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 1220120195836 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred ninety-five thousand, eight hundred thirty-six".