102021133111221 has 8 divisors (see below), whose sum is σ = 136592609754304. Its totient is φ = 67731872604480.

The previous prime is 102021133111211. The next prime is 102021133111301. The reversal of 102021133111221 is 122111331120201.

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

It is not a de Polignac number, because 102021133111221 - 2⁵ = 102021133111189 is a prime.

It is a super-2 number, since 2×102021133111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021133111211) 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, 70554033241 + ... + 70554034686.

It is an arithmetic number, because the mean of its divisors is an integer number (17074076219288).

Almost surely, 2^{102021133111221} is an apocalyptic number.

It is an amenable number.

102021133111221 is a deficient number, since it is larger than the sum of its proper divisors (34571476643083).

102021133111221 is a wasteful number, since it uses less digits than its factorization.

102021133111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141108068171.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 102021133111221 its reverse (122111331120201), we get a palindrome (224132464231422).

The spelling of 102021133111221 in words is "one hundred two trillion, twenty-one billion, one hundred thirty-three million, one hundred eleven thousand, two hundred twenty-one".