1221020300131 has 8 divisors (see below), whose sum is σ = 1223193230064. Its totient is φ = 1218849192960.

The previous prime is 1221020300111. The next prime is 1221020300147. The reversal of 1221020300131 is 1310030201221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221020300131 - 2²⁹ = 1220483429219 is a prime.

It is a super-2 number, since 2×1221020300131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221020300111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888771 + ... + 1797763.

It is an arithmetic number, because the mean of its divisors is an integer number (152899153758).

Almost surely, 2^{1221020300131} is an apocalyptic number.

1221020300131 is a deficient number, since it is larger than the sum of its proper divisors (2172929933).

1221020300131 is an equidigital number, since it uses as much as digits as its factorization.

1221020300131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911381.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1221020300131 its reverse (1310030201221), we get a palindrome (2531050501352).

The spelling of 1221020300131 in words is "one trillion, two hundred twenty-one billion, twenty million, three hundred thousand, one hundred thirty-one".