121221012120202 has 4 divisors (see below), whose sum is σ = 181831518180306. Its totient is φ = 60610506060100.

The previous prime is 121221012120193. The next prime is 121221012120211. The reversal of 121221012120202 is 202021210122121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121221012120193) and next prime (121221012120211).

It can be written as a sum of positive squares in only one way, i.e., 79971722321481 + 41249289798721 = 8942691^2 + 6422561^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121221012120202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305253030049 + ... + 30305253030052.

Almost surely, 2^{121221012120202} is an apocalyptic number.

121221012120202 is a deficient number, since it is larger than the sum of its proper divisors (60610506060104).

121221012120202 is an equidigital number, since it uses as much as digits as its factorization.

121221012120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610506060103.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221012120202 its reverse (202021210122121), we get a palindrome (323242222242323).

The spelling of 121221012120202 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twelve million, one hundred twenty thousand, two hundred two".