2021201112251 has 2 divisors, whose sum is σ = 2021201112252. Its totient is φ = 2021201112250.

The previous prime is 2021201112209. The next prime is 2021201112253. The reversal of 2021201112251 is 1522111021202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021201112251 - 2¹⁸ = 2021200850107 is a prime.

Together with 2021201112253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2021201112253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010600556125 + 1010600556126.

It is an arithmetic number, because the mean of its divisors is an integer number (1010600556126).

Almost surely, 2^{2021201112251} is an apocalyptic number.

2021201112251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021201112251 is an equidigital number, since it uses as much as digits as its factorization.

2021201112251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 2021201112251 its reverse (1522111021202), we get a palindrome (3543312133453).

The spelling of 2021201112251 in words is "two trillion, twenty-one billion, two hundred one million, one hundred twelve thousand, two hundred fifty-one".