2120020100251 has 2 divisors, whose sum is σ = 2120020100252. Its totient is φ = 2120020100250.

The previous prime is 2120020100207. The next prime is 2120020100299. The reversal of 2120020100251 is 1520010200212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120020100251 - 2¹⁵ = 2120020067483 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120027100251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060010050125 + 1060010050126.

It is an arithmetic number, because the mean of its divisors is an integer number (1060010050126).

Almost surely, 2^{2120020100251} is an apocalyptic number.

2120020100251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120020100251 is an equidigital number, since it uses as much as digits as its factorization.

2120020100251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 2120020100251 its reverse (1520010200212), we get a palindrome (3640030300463).

The spelling of 2120020100251 in words is "two trillion, one hundred twenty billion, twenty million, one hundred thousand, two hundred fifty-one".