2121010000121 has 4 divisors (see below), whose sum is σ = 2166137872512. Its totient is φ = 2075882127732.

The previous prime is 2121010000099. The next prime is 2121010000129. The reversal of 2121010000121 is 1210000101212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121010000121 is a prime.

It is a super-2 number, since 2×2121010000121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121010000129) 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, 22563936125 + ... + 22563936218.

It is an arithmetic number, because the mean of its divisors is an integer number (541534468128).

Almost surely, 2^{2121010000121} is an apocalyptic number.

It is an amenable number.

2121010000121 is a deficient number, since it is larger than the sum of its proper divisors (45127872391).

2121010000121 is an equidigital number, since it uses as much as digits as its factorization.

2121010000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45127872390.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2121010000121 its reverse (1210000101212), we get a palindrome (3331010101333).

The spelling of 2121010000121 in words is "two trillion, one hundred twenty-one billion, ten million, one hundred twenty-one", and thus it is an aban number.