2211021251 has 2 divisors, whose sum is σ = 2211021252. Its totient is φ = 2211021250.

The previous prime is 2211021233. The next prime is 2211021259. The reversal of 2211021251 is 1521201122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2211021251 - 2²⁶ = 2143912387 is a prime.

It is a super-2 number, since 2×2211021251² = 9777229944747210002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2211021259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105510625 + 1105510626.

It is an arithmetic number, because the mean of its divisors is an integer number (1105510626).

Almost surely, 2^2211021251 is an apocalyptic number.

2211021251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211021251 is an equidigital number, since it uses as much as digits as its factorization.

2211021251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2211021251 is about 47021.4977536871. The cubic root of 2211021251 is about 1302.7596703038.

Adding to 2211021251 its reverse (1521201122), we get a palindrome (3732222373).

The spelling of 2211021251 in words is "two billion, two hundred eleven million, twenty-one thousand, two hundred fifty-one".