20202213420251 has 2 divisors, whose sum is σ = 20202213420252. Its totient is φ = 20202213420250.

The previous prime is 20202213420209. The next prime is 20202213420377. The reversal of 20202213420251 is 15202431220202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202213420251 - 2³⁰ = 20201139678427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202213420251.

It is not a weakly prime, because it can be changed into another prime (20202213440251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101106710125 + 10101106710126.

It is an arithmetic number, because the mean of its divisors is an integer number (10101106710126).

Almost surely, 2^{20202213420251} is an apocalyptic number.

20202213420251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202213420251 is an equidigital number, since it uses as much as digits as its factorization.

20202213420251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20202213420251 its reverse (15202431220202), we get a palindrome (35404644640453).

The spelling of 20202213420251 in words is "twenty trillion, two hundred two billion, two hundred thirteen million, four hundred twenty thousand, two hundred fifty-one".