102910120020 has 36 divisors (see below), whose sum is σ = 312160697940. Its totient is φ = 27442698624.

The previous prime is 102910120009. The next prime is 102910120031. The reversal of 102910120020 is 20021019201.

It is an interprime number because it is at equal distance from previous prime (102910120009) and next prime (102910120031).

It can be written as a sum of positive squares in 2 ways, for example, as 21387307536 + 81522812484 = 146244^2 + 285522^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102910119975 and 102910120002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285861265 + ... + 285861624.

Almost surely, 2^102910120020 is an apocalyptic number.

102910120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102910120020 is an abundant number, since it is smaller than the sum of its proper divisors (209250577920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102910120020 is a wasteful number, since it uses less digits than its factorization.

102910120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571722904 (or 571722899 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 102910120020 its reverse (20021019201), we get a palindrome (122931139221).

The spelling of 102910120020 in words is "one hundred two billion, nine hundred ten million, one hundred twenty thousand, twenty".