102156211 has 2 divisors, whose sum is σ = 102156212. Its totient is φ = 102156210.

The previous prime is 102156193. The next prime is 102156221. The reversal of 102156211 is 112651201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102156211 - 2⁹ = 102155699 is a prime.

It is not a weakly prime, because it can be changed into another prime (102156221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51078105 + 51078106.

It is an arithmetic number, because the mean of its divisors is an integer number (51078106).

Almost surely, 2^102156211 is an apocalyptic number.

102156211 is a deficient number, since it is larger than the sum of its proper divisors (1).

102156211 is an equidigital number, since it uses as much as digits as its factorization.

102156211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 102156211 is about 10107.2355765560. The cubic root of 102156211 is about 467.4712705042.

The spelling of 102156211 in words is "one hundred two million, one hundred fifty-six thousand, two hundred eleven".