23211220212 has 72 divisors (see below), whose sum is σ = 60628809696. Its totient is φ = 7481709504.

The previous prime is 23211220177. The next prime is 23211220261. The reversal of 23211220212 is 21202211232.

23211220212 is a `hidden beast` number, since 23 + 211 + 220 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163663 + ... + 270569.

Almost surely, 2^23211220212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23211220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30314404848).

23211220212 is an abundant number, since it is smaller than the sum of its proper divisors (37417589484).

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

23211220212 is a wasteful number, since it uses less digits than its factorization.

23211220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107117 (or 107112 counting only the distinct ones).

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

Adding to 23211220212 its reverse (21202211232), we get a palindrome (44413431444).

The spelling of 23211220212 in words is "twenty-three billion, two hundred eleven million, two hundred twenty thousand, two hundred twelve".