1131312021990 has 32 divisors (see below), whose sum is σ = 2734682307840. Its totient is φ = 299512821984.

The previous prime is 1131312021989. The next prime is 1131312022067. The reversal of 1131312021990 is 991202131311.

It is a happy number.

It is a congruent number.

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, 135644754 + ... + 135653093.

It is an arithmetic number, because the mean of its divisors is an integer number (85458822120).

Almost surely, 2^{1131312021990} is an apocalyptic number.

1131312021990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131312021990 is an abundant number, since it is smaller than the sum of its proper divisors (1603370285850).

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

1131312021990 is a wasteful number, since it uses less digits than its factorization.

1131312021990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271297996.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 1131312021990 in words is "one trillion, one hundred thirty-one billion, three hundred twelve million, twenty-one thousand, nine hundred ninety".