23121000102420 has 144 divisors (see below), whose sum is σ = 78577315584768. Its totient is φ = 5453601972480.

The previous prime is 23121000102359. The next prime is 23121000102439. The reversal of 23121000102420 is 2420100012132.

It is a happy number.

23121000102420 is a `hidden beast` number, since 2 + 31 + 210 + 0 + 0 + 1 + 0 + 2 + 420 = 666.

It is a super-2 number, since 2×23121000102420² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23121000102393 and 23121000102402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157727724 + ... + 157874243.

It is an arithmetic number, because the mean of its divisors is an integer number (545675802672).

Almost surely, 2^{23121000102420} is an apocalyptic number.

23121000102420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121000102420 is an abundant number, since it is smaller than the sum of its proper divisors (55456315482348).

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

23121000102420 is a wasteful number, since it uses less digits than its factorization.

23121000102420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315602030 (or 315602025 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 23121000102420 its reverse (2420100012132), we get a palindrome (25541100114552).

The spelling of 23121000102420 in words is "twenty-three trillion, one hundred twenty-one billion, one hundred two thousand, four hundred twenty".