1021220102121 has 16 divisors (see below), whose sum is σ = 1441745547264. Its totient is φ = 640755309824.

The previous prime is 1021220102083. The next prime is 1021220102153. The reversal of 1021220102121 is 1212010221201.

It is a cyclic number.

It is not a de Polignac number, because 1021220102121 - 2³⁸ = 746342195177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021220102121.

It is not an unprimeable number, because it can be changed into a prime (1021220102521) 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, 4230151 + ... + 4465043.

It is an arithmetic number, because the mean of its divisors is an integer number (90109096704).

Almost surely, 2^{1021220102121} is an apocalyptic number.

It is an amenable number.

1021220102121 is a deficient number, since it is larger than the sum of its proper divisors (420525445143).

1021220102121 is a wasteful number, since it uses less digits than its factorization.

1021220102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320160.

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

Adding to 1021220102121 its reverse (1212010221201), we get a palindrome (2233230323322).

The spelling of 1021220102121 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred two thousand, one hundred twenty-one".