102021142040 has 32 divisors (see below), whose sum is σ = 229579974000. Its totient is φ = 40802696064.

The previous prime is 102021142007. The next prime is 102021142061. The reversal of 102021142040 is 40241120201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112751 + ... + 465569.

Almost surely, 2^102021142040 is an apocalyptic number.

102021142040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021142040 is an abundant number, since it is smaller than the sum of its proper divisors (127558831960).

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

102021142040 is a wasteful number, since it uses less digits than its factorization.

102021142040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360059 (or 360055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102021142040 its reverse (40241120201), we get a palindrome (142262262241).

The spelling of 102021142040 in words is "one hundred two billion, twenty-one million, one hundred forty-two thousand, forty".