121202002111221 has 6 divisors (see below), whose sum is σ = 175069558605110. Its totient is φ = 80801334740808.

The previous prime is 121202002111163. The next prime is 121202002111231. The reversal of 121202002111221 is 122111200202121.

121202002111221 is a `hidden beast` number, since 1 + 212 + 0 + 20 + 0 + 211 + 1 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 106121128883121 + 15080873228100 = 10301511^2 + 3883410^2 .

It is not a de Polignac number, because 121202002111221 - 2⁷ = 121202002111093 is a prime.

It is a super-2 number, since 2×121202002111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202002111194 and 121202002111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202002111231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6733444561726 + ... + 6733444561743.

Almost surely, 2^{121202002111221} is an apocalyptic number.

It is an amenable number.

121202002111221 is a deficient number, since it is larger than the sum of its proper divisors (53867556493889).

121202002111221 is a wasteful number, since it uses less digits than its factorization.

121202002111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13466889123475 (or 13466889123472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121202002111221 its reverse (122111200202121), we get a palindrome (243313202313342).

The spelling of 121202002111221 in words is "one hundred twenty-one trillion, two hundred two billion, two million, one hundred eleven thousand, two hundred twenty-one".