102010111021221 has 32 divisors (see below), whose sum is σ = 146847881107200. Its totient is φ = 62616281554944.

The previous prime is 102010111021213. The next prime is 102010111021223. The reversal of 102010111021221 is 122120111010201.

It is a happy number.

It is not a de Polignac number, because 102010111021221 - 2³ = 102010111021213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102010111021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102010111021223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25041615 + ... + 28828851.

It is an arithmetic number, because the mean of its divisors is an integer number (4588996284600).

Almost surely, 2^{102010111021221} is an apocalyptic number.

It is an amenable number.

102010111021221 is a deficient number, since it is larger than the sum of its proper divisors (44837770085979).

102010111021221 is a wasteful number, since it uses less digits than its factorization.

102010111021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789005.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102010111021221 its reverse (122120111010201), we get a palindrome (224130222031422).

The spelling of 102010111021221 in words is "one hundred two trillion, ten billion, one hundred eleven million, twenty-one thousand, two hundred twenty-one".