101521103999 has 16 divisors (see below), whose sum is σ = 122860302336. Its totient is φ = 81891888000.

The previous prime is 101521103993. The next prime is 101521104023. The reversal of 101521103999 is 999301125101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101521103999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101521103993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1532534 + ... + 1597404.

It is an arithmetic number, because the mean of its divisors is an integer number (7678768896).

Almost surely, 2^101521103999 is an apocalyptic number.

101521103999 is a deficient number, since it is larger than the sum of its proper divisors (21339198337).

101521103999 is a wasteful number, since it uses less digits than its factorization.

101521103999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78046.

The product of its (nonzero) digits is 21870, while the sum is 41.

The spelling of 101521103999 in words is "one hundred one billion, five hundred twenty-one million, one hundred three thousand, nine hundred ninety-nine".