102112203440 has 80 divisors (see below), whose sum is σ = 257204662848. Its totient is φ = 37477137408.

The previous prime is 102112203419. The next prime is 102112203461. The reversal of 102112203440 is 44302211201.

It is an interprime number because it is at equal distance from previous prime (102112203419) and next prime (102112203461).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120287 + ... + 467646.

Almost surely, 2^102112203440 is an apocalyptic number.

102112203440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102112203440 is an abundant number, since it is smaller than the sum of its proper divisors (155092459408).

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

102112203440 is a wasteful number, since it uses less digits than its factorization.

102112203440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588126 (or 588120 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 102112203440 its reverse (44302211201), we get a palindrome (146414414641).

The spelling of 102112203440 in words is "one hundred two billion, one hundred twelve million, two hundred three thousand, four hundred forty".