101221102020999 has 16 divisors (see below), whose sum is σ = 140958383034240. Its totient is φ = 64544101696800.

The previous prime is 101221102020967. The next prime is 101221102021099. The reversal of 101221102020999 is 999020201122101.

It is a happy number.

It is not a de Polignac number, because 101221102020999 - 2⁵ = 101221102020967 is a prime.

It is a super-2 number, since 2×101221102020999² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221102020919) 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, 7727974977 + ... + 7727988074.

It is an arithmetic number, because the mean of its divisors is an integer number (8809898939640).

Almost surely, 2^{101221102020999} is an apocalyptic number.

101221102020999 is a deficient number, since it is larger than the sum of its proper divisors (39737281013241).

101221102020999 is a wasteful number, since it uses less digits than its factorization.

101221102020999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15455963150.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 101221102020999 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred two million, twenty thousand, nine hundred ninety-nine".