102011951 has 4 divisors (see below), whose sum is σ = 108012672. Its totient is φ = 96011232.

The previous prime is 102011933. The next prime is 102011957. The reversal of 102011951 is 159110201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102011951 - 2¹⁴ = 101995567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000335 + ... + 3000368.

It is an arithmetic number, because the mean of its divisors is an integer number (27003168).

Almost surely, 2^102011951 is an apocalyptic number.

102011951 is a deficient number, since it is larger than the sum of its proper divisors (6000721).

102011951 is an equidigital number, since it uses as much as digits as its factorization.

102011951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000720.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 102011951 is about 10100.0965836966. The cubic root of 102011951 is about 467.2511201623.

The spelling of 102011951 in words is "one hundred two million, eleven thousand, nine hundred fifty-one".