102010981 has 4 divisors (see below), whose sum is σ = 107380000. Its totient is φ = 96641964.

The previous prime is 102010973. The next prime is 102010991. The reversal of 102010981 is 189010201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189010201 = 941 ⋅200861.

It is a cyclic number.

It is not a de Polignac number, because 102010981 - 2³ = 102010973 is a prime.

It is a super-2 number, since 2×102010981² = 20812480489164722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102010991) 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, 2684481 + ... + 2684518.

It is an arithmetic number, because the mean of its divisors is an integer number (26845000).

Almost surely, 2^102010981 is an apocalyptic number.

It is an amenable number.

102010981 is a deficient number, since it is larger than the sum of its proper divisors (5369019).

102010981 is an equidigital number, since it uses as much as digits as its factorization.

102010981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369018.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 102010981 is about 10100.0485642397. The cubic root of 102010981 is about 467.2496391756.

The spelling of 102010981 in words is "one hundred two million, ten thousand, nine hundred eighty-one".