212221021230 has 96 divisors (see below), whose sum is σ = 560320776288. Its totient is φ = 55721952000.

The previous prime is 212221021153. The next prime is 212221021283. The reversal of 212221021230 is 32120122212.

212221021230 is a `hidden beast` number, since 212 + 2 + 210 + 212 + 30 = 666.

It is a super-2 number, since 2×212221021230² (a number of 23 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 1580797 + ... + 1709783.

It is an arithmetic number, because the mean of its divisors is an integer number (5836674753).

Almost surely, 2^212221021230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221021230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280160388144).

212221021230 is an abundant number, since it is smaller than the sum of its proper divisors (348099755058).

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

212221021230 is a wasteful number, since it uses less digits than its factorization.

212221021230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129282 (or 129279 counting only the distinct ones).

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

Adding to 212221021230 its reverse (32120122212), we get a palindrome (244341143442).

The spelling of 212221021230 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred thirty".