102122240420 has 48 divisors (see below), whose sum is σ = 221474781696. Its totient is φ = 39513312000.

The previous prime is 102122240419. The next prime is 102122240449. The reversal of 102122240420 is 24042221201.

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

It is a junction number, because it is equal to n+sod(n) for n = 102122240392 and 102122240401.

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, 1378115 + ... + 1450325.

It is an arithmetic number, because the mean of its divisors is an integer number (4614057952).

Almost surely, 2^102122240420 is an apocalyptic number.

102122240420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102122240420 is an abundant number, since it is smaller than the sum of its proper divisors (119352541276).

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

102122240420 is a wasteful number, since it uses less digits than its factorization.

102122240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74532 (or 74530 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 102122240420 its reverse (24042221201), we get a palindrome (126164461621).

The spelling of 102122240420 in words is "one hundred two billion, one hundred twenty-two million, two hundred forty thousand, four hundred twenty".