102121020001221 has 8 divisors (see below), whose sum is σ = 146635310771040. Its totient is φ = 62843704616112.

The previous prime is 102121020001177. The next prime is 102121020001223. The reversal of 102121020001221 is 122100020121201.

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

It is not a de Polignac number, because 102121020001221 - 2²⁷ = 102120885783493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102121020001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121020001223) 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, 1309243846131 + ... + 1309243846208.

It is an arithmetic number, because the mean of its divisors is an integer number (18329413846380).

Almost surely, 2^{102121020001221} is an apocalyptic number.

It is an amenable number.

102121020001221 is a deficient number, since it is larger than the sum of its proper divisors (44514290769819).

102121020001221 is a wasteful number, since it uses less digits than its factorization.

102121020001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618487692355.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102121020001221 its reverse (122100020121201), we get a palindrome (224221040122422).

The spelling of 102121020001221 in words is "one hundred two trillion, one hundred twenty-one billion, twenty million, one thousand, two hundred twenty-one".