2120011002121 has 4 divisors (see below), whose sum is σ = 2133017204752. Its totient is φ = 2107004799492.

The previous prime is 2120011002023. The next prime is 2120011002133. The reversal of 2120011002121 is 1212001100212.

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 not a de Polignac number, because 2120011002121 - 2¹⁷ = 2120010871049 is a prime.

It is a super-2 number, since 2×2120011002121² (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 (2120011006121) 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, 6503101071 + ... + 6503101396.

It is an arithmetic number, because the mean of its divisors is an integer number (533254301188).

Almost surely, 2^{2120011002121} is an apocalyptic number.

It is an amenable number.

2120011002121 is a deficient number, since it is larger than the sum of its proper divisors (13006202631).

2120011002121 is a wasteful number, since it uses less digits than its factorization.

2120011002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13006202630.

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

Adding to 2120011002121 its reverse (1212001100212), we get a palindrome (3332012102333).

The spelling of 2120011002121 in words is "two trillion, one hundred twenty billion, eleven million, two thousand, one hundred twenty-one".