1102020251 has 2 divisors, whose sum is σ = 1102020252. Its totient is φ = 1102020250.

The previous prime is 1102020187. The next prime is 1102020253. The reversal of 1102020251 is 1520202011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1102020251 - 2⁶ = 1102020187 is a prime.

It is a super-2 number, since 2×1102020251² = 2428897267228206002, which contains 22 as substring.

Together with 1102020253, 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 (1102020253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551010125 + 551010126.

It is an arithmetic number, because the mean of its divisors is an integer number (551010126).

Almost surely, 2^1102020251 is an apocalyptic number.

1102020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102020251 is an equidigital number, since it uses as much as digits as its factorization.

1102020251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1102020251 is about 33196.6903621430. The cubic root of 1102020251 is about 1032.9116880384.

Adding to 1102020251 its reverse (1520202011), we get a palindrome (2622222262).

The spelling of 1102020251 in words is "one billion, one hundred two million, twenty thousand, two hundred fifty-one".