121102002111221 has 12 divisors (see below), whose sum is σ = 129433918624992. Its totient is φ = 113279101172928.

The previous prime is 121102002111161. The next prime is 121102002111317. The reversal of 121102002111221 is 122111200201121.

It is not a de Polignac number, because 121102002111221 - 2¹⁸ = 121102001849077 is a prime.

It is a super-2 number, since 2×121102002111221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121102002111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102002111121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1285345745 + ... + 1285439958.

It is an arithmetic number, because the mean of its divisors is an integer number (10786159885416).

Almost surely, 2^{121102002111221} is an apocalyptic number.

It is an amenable number.

121102002111221 is a deficient number, since it is larger than the sum of its proper divisors (8331916513771).

121102002111221 is a wasteful number, since it uses less digits than its factorization.

121102002111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570785900 (or 2570785883 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121102002111221 its reverse (122111200201121), we get a palindrome (243213202312342).

The spelling of 121102002111221 in words is "one hundred twenty-one trillion, one hundred two billion, two million, one hundred eleven thousand, two hundred twenty-one".