102120321242440 has 32 divisors (see below), whose sum is σ = 230801084801280. Its totient is φ = 40664953029312.

The previous prime is 102120321242383. The next prime is 102120321242503. The reversal of 102120321242440 is 44242123021201.

It is a junction number, because it is equal to n+sod(n) for n = 102120321242399 and 102120321242408.

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, 5724224334 + ... + 5724242173.

It is an arithmetic number, because the mean of its divisors is an integer number (7212533900040).

Almost surely, 2^{102120321242440} is an apocalyptic number.

102120321242440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120321242440 is an abundant number, since it is smaller than the sum of its proper divisors (128680763558840).

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

102120321242440 is a wasteful number, since it uses less digits than its factorization.

102120321242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11448466741 (or 11448466737 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 102120321242440 its reverse (44242123021201), we get a palindrome (146362444263641).

The spelling of 102120321242440 in words is "one hundred two trillion, one hundred twenty billion, three hundred twenty-one million, two hundred forty-two thousand, four hundred forty".