102021101312221 has 32 divisors (see below), whose sum is σ = 128571298023168. Its totient is φ = 78789542469120.

The previous prime is 102021101312213. The next prime is 102021101312257. The reversal of 102021101312221 is 122213101120201.

It is not a de Polignac number, because 102021101312221 - 2³ = 102021101312213 is a prime.

It is a super-2 number, since 2×102021101312221² (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 (102021101322221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3007126 + ... + 14597431.

It is an arithmetic number, because the mean of its divisors is an integer number (4017853063224).

Almost surely, 2^{102021101312221} is an apocalyptic number.

It is an amenable number.

102021101312221 is a deficient number, since it is larger than the sum of its proper divisors (26550196710947).

102021101312221 is a wasteful number, since it uses less digits than its factorization.

102021101312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17606101.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 102021101312221 its reverse (122213101120201), we get a palindrome (224234202432422).

The spelling of 102021101312221 in words is "one hundred two trillion, twenty-one billion, one hundred one million, three hundred twelve thousand, two hundred twenty-one".