23220121040 has 80 divisors (see below), whose sum is σ = 56451886848. Its totient is φ = 8865635328.

The previous prime is 23220120961. The next prime is 23220121079. The reversal of 23220121040 is 4012102232.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×23220121040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 883124 + ... + 909036.

Almost surely, 2^23220121040 is an apocalyptic number.

23220121040 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 23220121040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28225943424).

23220121040 is an abundant number, since it is smaller than the sum of its proper divisors (33231765808).

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

23220121040 is a wasteful number, since it uses less digits than its factorization.

23220121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26436 (or 26430 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 23220121040 its reverse (4012102232), we get a palindrome (27232223272).

The spelling of 23220121040 in words is "twenty-three billion, two hundred twenty million, one hundred twenty-one thousand, forty".