102051211 has 4 divisors (see below), whose sum is σ = 103488624. Its totient is φ = 100613800.

The previous prime is 102051199. The next prime is 102051233. The reversal of 102051211 is 112150201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112150201 = 1217 ⋅92153.

It is a cyclic number.

It is not a de Polignac number, because 102051211 - 2¹⁷ = 101920139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102051191 and 102051200.

It is not an unprimeable number, because it can be changed into a prime (102051011) 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 in 3 ways as a sum of consecutive naturals, for example, 718600 + ... + 718741.

It is an arithmetic number, because the mean of its divisors is an integer number (25872156).

Almost surely, 2^102051211 is an apocalyptic number.

102051211 is a deficient number, since it is larger than the sum of its proper divisors (1437413).

102051211 is an equidigital number, since it uses as much as digits as its factorization.

102051211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437412.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 102051211 is about 10102.0399425067. The cubic root of 102051211 is about 467.3110540753.

The spelling of 102051211 in words is "one hundred two million, fifty-one thousand, two hundred eleven".