210220110000121 has 8 divisors (see below), whose sum is σ = 234197470027080. Its totient is φ = 187357976020992.

The previous prime is 210220110000107. The next prime is 210220110000127. The reversal of 210220110000121 is 121000011022012.

It can be written as a sum of positive squares in 4 ways, for example, as 15287943600400 + 194932166399721 = 3909980^2 + 13961811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210220110000121 - 2²⁷ = 210219975782393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (210220110000127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278806511560 + ... + 278806512313.

It is an arithmetic number, because the mean of its divisors is an integer number (29274683753385).

Almost surely, 2^{210220110000121} is an apocalyptic number.

It is an amenable number.

210220110000121 is a deficient number, since it is larger than the sum of its proper divisors (23977360026959).

210220110000121 is a wasteful number, since it uses less digits than its factorization.

210220110000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557613023915.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210220110000121 its reverse (121000011022012), we get a palindrome (331220121022133).

The spelling of 210220110000121 in words is "two hundred ten trillion, two hundred twenty billion, one hundred ten million, one hundred twenty-one", and thus it is an aban number.