212002111012121 has 4 divisors (see below), whose sum is σ = 212004829867572. Its totient is φ = 211999392156672.

The previous prime is 212002111012019. The next prime is 212002111012129. The reversal of 212002111012121 is 121210111200212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63358734432400 + 148643376579721 = 7959820^2 + 12191939^2 .

It is a cyclic number.

It is not a de Polignac number, because 212002111012121 - 2³⁴ = 211984931142937 is a prime.

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 212002111012121.

It is not an unprimeable number, because it can be changed into a prime (212002111012129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1359310760 + ... + 1359466713.

It is an arithmetic number, because the mean of its divisors is an integer number (53001207466893).

Almost surely, 2^{212002111012121} is an apocalyptic number.

It is an amenable number.

212002111012121 is a deficient number, since it is larger than the sum of its proper divisors (2718855451).

212002111012121 is an equidigital number, since it uses as much as digits as its factorization.

212002111012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718855450.

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

Adding to 212002111012121 its reverse (121210111200212), we get a palindrome (333212222212333).

The spelling of 212002111012121 in words is "two hundred twelve trillion, two billion, one hundred eleven million, twelve thousand, one hundred twenty-one".