20210002201951 has 2 divisors, whose sum is σ = 20210002201952. Its totient is φ = 20210002201950.

The previous prime is 20210002201853. The next prime is 20210002202011. The reversal of 20210002201951 is 15910220001202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20210002201951 - 2²⁷ = 20209867984223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210002801951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105001100975 + 10105001100976.

It is an arithmetic number, because the mean of its divisors is an integer number (10105001100976).

Almost surely, 2^{20210002201951} is an apocalyptic number.

20210002201951 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210002201951 is an equidigital number, since it uses as much as digits as its factorization.

20210002201951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 20210002201951 in words is "twenty trillion, two hundred ten billion, two million, two hundred one thousand, nine hundred fifty-one".