2101520231044 has 36 divisors (see below), whose sum is σ = 4140242434636. Its totient is φ = 927761427648.

The previous prime is 2101520231011. The next prime is 2101520231137. The reversal of 2101520231044 is 4401320251012.

It can be written as a sum of positive squares in 2 ways, for example, as 207263488644 + 1894256742400 = 455262^2 + 1376320^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38170839 + ... + 38225854.

Almost surely, 2^{2101520231044} is an apocalyptic number.

It is an amenable number.

2101520231044 is a deficient number, since it is larger than the sum of its proper divisors (2038722203592).

2101520231044 is a wasteful number, since it uses less digits than its factorization.

2101520231044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76396756 (or 76396731 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2101520231044 its reverse (4401320251012), we get a palindrome (6502840482056).

The spelling of 2101520231044 in words is "two trillion, one hundred one billion, five hundred twenty million, two hundred thirty-one thousand, forty-four".