101221010021001 has 16 divisors (see below), whose sum is σ = 147806429238720. Its totient is φ = 61234092110400.

The previous prime is 101221010020981. The next prime is 101221010021107. The reversal of 101221010021001 is 100120010122101.

It is not a de Polignac number, because 101221010021001 - 2¹⁷ = 101221009889929 is a prime.

It is a super-2 number, since 2×101221010021001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101221010021701) 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, 21995002050 + ... + 21995006651.

It is an arithmetic number, because the mean of its divisors is an integer number (9237901827420).

Almost surely, 2^{101221010021001} is an apocalyptic number.

It is an amenable number.

101221010021001 is a deficient number, since it is larger than the sum of its proper divisors (46585419217719).

101221010021001 is a wasteful number, since it uses less digits than its factorization.

101221010021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43990008776.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101221010021001 its reverse (100120010122101), we get a palindrome (201341020143102).

The spelling of 101221010021001 in words is "one hundred one trillion, two hundred twenty-one billion, ten million, twenty-one thousand, one".