102121324420 has 48 divisors (see below), whose sum is σ = 223011532800. Its totient is φ = 39233425280.

The previous prime is 102121324397. The next prime is 102121324441. The reversal of 102121324420 is 24423121201.

It is a junction number, because it is equal to n+sod(n) for n = 102121324391 and 102121324400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350140 + ... + 571699.

It is an arithmetic number, because the mean of its divisors is an integer number (4646073600).

Almost surely, 2^102121324420 is an apocalyptic number.

102121324420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121324420 is an abundant number, since it is smaller than the sum of its proper divisors (120890208380).

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

102121324420 is a wasteful number, since it uses less digits than its factorization.

102121324420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922068 (or 922066 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 102121324420 its reverse (24423121201), we get a palindrome (126544445621).

The spelling of 102121324420 in words is "one hundred two billion, one hundred twenty-one million, three hundred twenty-four thousand, four hundred twenty".