102121002202221 has 32 divisors (see below), whose sum is σ = 156200939520000. Its totient is φ = 65871763740720.

The previous prime is 102121002202213. The next prime is 102121002202223. The reversal of 102121002202221 is 122202200121201.

It is a happy number.

102121002202221 is a `hidden beast` number, since 1 + 0 + 212 + 10 + 0 + 220 + 2 + 221 = 666.

It is not a de Polignac number, because 102121002202221 - 2³ = 102121002202213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102121002202194 and 102121002202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121002202223) 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, 7481721 + ... + 16131278.

It is an arithmetic number, because the mean of its divisors is an integer number (4881279360000).

Almost surely, 2^{102121002202221} is an apocalyptic number.

It is an amenable number.

102121002202221 is a deficient number, since it is larger than the sum of its proper divisors (54079937317779).

102121002202221 is a wasteful number, since it uses less digits than its factorization.

102121002202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23618206 (or 23618200 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102121002202221 its reverse (122202200121201), we get a palindrome (224323202323422).

The spelling of 102121002202221 in words is "one hundred two trillion, one hundred twenty-one billion, two million, two hundred two thousand, two hundred twenty-one".