102520421761040 has 20 divisors (see below), whose sum is σ = 238359980594604. Its totient is φ = 41008168704384.

The previous prime is 102520421761003. The next prime is 102520421761061. The reversal of 102520421761040 is 40167124025201.

It can be written as a sum of positive squares in 2 ways, for example, as 10524470292736 + 91995951468304 = 3244144^2 + 9591452^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640752635927 + ... + 640752636086.

Almost surely, 2^{102520421761040} is an apocalyptic number.

102520421761040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102520421761040 is an abundant number, since it is smaller than the sum of its proper divisors (135839558833564).

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

102520421761040 is a wasteful number, since it uses less digits than its factorization.

102520421761040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281505272026 (or 1281505272020 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

Adding to 102520421761040 its reverse (40167124025201), we get a palindrome (142687545786241).

The spelling of 102520421761040 in words is "one hundred two trillion, five hundred twenty billion, four hundred twenty-one million, seven hundred sixty-one thousand, forty".