121201021000221 has 16 divisors (see below), whose sum is σ = 161664518496000. Its totient is φ = 80769103138368.

The previous prime is 121201021000219. The next prime is 121201021000223. The reversal of 121201021000221 is 122000120102121.

It is an interprime number because it is at equal distance from previous prime (121201021000219) and next prime (121201021000223).

It is not a de Polignac number, because 121201021000221 - 2¹ = 121201021000219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121201021000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201021000223) 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, 698280955 + ... + 698454503.

It is an arithmetic number, because the mean of its divisors is an integer number (10104032406000).

Almost surely, 2^{121201021000221} is an apocalyptic number.

It is an amenable number.

121201021000221 is a deficient number, since it is larger than the sum of its proper divisors (40463497495779).

121201021000221 is a wasteful number, since it uses less digits than its factorization.

121201021000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263188.

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

Adding to 121201021000221 its reverse (122000120102121), we get a palindrome (243201141102342).

The spelling of 121201021000221 in words is "one hundred twenty-one trillion, two hundred one billion, twenty-one million, two hundred twenty-one", and thus it is an aban number.