121101313221021 has 64 divisors (see below), whose sum is σ = 196255918817280. Its totient is φ = 64943108778240.

The previous prime is 121101313221011. The next prime is 121101313221043. The reversal of 121101313221021 is 120122313101121.

It is not a de Polignac number, because 121101313221021 - 2⁶ = 121101313220957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101313221011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19618600 + ... + 25041806.

It is an arithmetic number, because the mean of its divisors is an integer number (3066498731520).

Almost surely, 2^{121101313221021} is an apocalyptic number.

It is an amenable number.

121101313221021 is a deficient number, since it is larger than the sum of its proper divisors (75154605596259).

121101313221021 is a wasteful number, since it uses less digits than its factorization.

121101313221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5424274.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 121101313221021 its reverse (120122313101121), we get a palindrome (241223626322142).

The spelling of 121101313221021 in words is "one hundred twenty-one trillion, one hundred one billion, three hundred thirteen million, two hundred twenty-one thousand, twenty-one".