21233031210 has 192 divisors, whose sum is σ = 61053108480. Its totient is φ = 5101071360.

The previous prime is 21233031179. The next prime is 21233031227. The reversal of 21233031210 is 1213033212.

21233031210 is a `hidden beast` number, since 2 + 12 + 330 + 312 + 10 = 666.

It is a super-2 number, since 2×21233031210² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2456917 + ... + 2465543.

It is an arithmetic number, because the mean of its divisors is an integer number (317984940).

Almost surely, 2^21233031210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233031210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30526554240).

21233031210 is an abundant number, since it is smaller than the sum of its proper divisors (39820077270).

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

21233031210 is a wasteful number, since it uses less digits than its factorization.

21233031210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733 (or 8730 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21233031210 its reverse (1213033212), we get a palindrome (22446064422).

The spelling of 21233031210 in words is "twenty-one billion, two hundred thirty-three million, thirty-one thousand, two hundred ten".