23201121210 has 32 divisors (see below), whose sum is σ = 57187631232. Its totient is φ = 6019750080.

The previous prime is 23201121193. The next prime is 23201121211. The reversal of 23201121210 is 1212110232.

It is a super-2 number, since 2×23201121210² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23201121210.

It is not an unprimeable number, because it can be changed into a prime (23201121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10449846 + ... + 10452065.

It is an arithmetic number, because the mean of its divisors is an integer number (1787113476).

Almost surely, 2^23201121210 is an apocalyptic number.

23201121210 is an abundant number, since it is smaller than the sum of its proper divisors (33986510022).

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

23201121210 is a wasteful number, since it uses less digits than its factorization.

23201121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20901958.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 23201121210 its reverse (1212110232), we get a palindrome (24413231442).

The spelling of 23201121210 in words is "twenty-three billion, two hundred one million, one hundred twenty-one thousand, two hundred ten".