23140121220 has 144 divisors (see below), whose sum is σ = 70701216768. Its totient is φ = 6126082560.

The previous prime is 23140121219. The next prime is 23140121227. The reversal of 23140121220 is 2212104132.

It is a happy number.

23140121220 is a `hidden beast` number, since 2 + 31 + 401 + 212 + 20 = 666.

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 = 23140121193 and 23140121202.

It is not an unprimeable number, because it can be changed into a prime (23140121227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21287517 + ... + 21288603.

It is an arithmetic number, because the mean of its divisors is an integer number (490980672).

Almost surely, 2^23140121220 is an apocalyptic number.

23140121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23140121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35350608384).

23140121220 is an abundant number, since it is smaller than the sum of its proper divisors (47561095548).

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

23140121220 is a wasteful number, since it uses less digits than its factorization.

23140121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1845 counting only the distinct ones).

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

Adding to 23140121220 its reverse (2212104132), we get a palindrome (25352225352).

The spelling of 23140121220 in words is "twenty-three billion, one hundred forty million, one hundred twenty-one thousand, two hundred twenty".