2120121102001 has 16 divisors (see below), whose sum is σ = 2479942168704. Its totient is φ = 1774557074304.

The previous prime is 2120121101993. The next prime is 2120121102023. The reversal of 2120121102001 is 1002011210212.

It is not a de Polignac number, because 2120121102001 - 2³ = 2120121101993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120121102031) 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, 404061 + ... + 2098453.

It is an arithmetic number, because the mean of its divisors is an integer number (154996385544).

Almost surely, 2^{2120121102001} is an apocalyptic number.

It is an amenable number.

2120121102001 is a deficient number, since it is larger than the sum of its proper divisors (359821066703).

2120121102001 is a wasteful number, since it uses less digits than its factorization.

2120121102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698600.

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

Adding to 2120121102001 its reverse (1002011210212), we get a palindrome (3122132312213).

The spelling of 2120121102001 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, one hundred two thousand, one".