102121120222221 has 16 divisors (see below), whose sum is σ = 136861771894848. Its totient is φ = 67731484128000.

The previous prime is 102121120222183. The next prime is 102121120222223. The reversal of 102121120222221 is 122222021121201.

It is not a de Polignac number, because 102121120222221 - 2²⁷ = 102120986004493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121120222223) 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, 109089255 + ... + 110021396.

It is an arithmetic number, because the mean of its divisors is an integer number (8553860743428).

Almost surely, 2^{102121120222221} is an apocalyptic number.

It is an amenable number.

102121120222221 is a deficient number, since it is larger than the sum of its proper divisors (34740651672627).

102121120222221 is a wasteful number, since it uses less digits than its factorization.

102121120222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219111452.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 102121120222221 its reverse (122222021121201), we get a palindrome (224343141343422).

The spelling of 102121120222221 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".