101221102021 has 8 divisors (see below), whose sum is σ = 109030486880. Its totient is φ = 93415023792.

The previous prime is 101221101997. The next prime is 101221102033. The reversal of 101221102021 is 120201122101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101221102021 - 2²⁵ = 101187547589 is a prime.

It is a super-2 number, since 2×101221102021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221101992 and 101221102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221102061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762891 + ... + 885688.

It is an arithmetic number, because the mean of its divisors is an integer number (13628810860).

Almost surely, 2^101221102021 is an apocalyptic number.

It is an amenable number.

101221102021 is a deficient number, since it is larger than the sum of its proper divisors (7809384859).

101221102021 is a wasteful number, since it uses less digits than its factorization.

101221102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653315.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101221102021 its reverse (120201122101), we get a palindrome (221422224122).

The spelling of 101221102021 in words is "one hundred one billion, two hundred twenty-one million, one hundred two thousand, twenty-one".