212022221000 has 64 divisors (see below), whose sum is σ = 496519320960. Its totient is φ = 84742680000.

The previous prime is 212022220981. The next prime is 212022221023. The reversal of 212022221000 is 122220212.

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, 1208885 + ... + 1373115.

It is an arithmetic number, because the mean of its divisors is an integer number (7758114390).

Almost surely, 2^212022221000 is an apocalyptic number.

212022221000 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 212022221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248259660480).

212022221000 is an abundant number, since it is smaller than the sum of its proper divisors (284497099960).

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

212022221000 is a wasteful number, since it uses less digits than its factorization.

212022221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165543 (or 165529 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 212022221000 its reverse (122220212), we get a palindrome (212144441212).

The spelling of 212022221000 in words is "two hundred twelve billion, twenty-two million, two hundred twenty-one thousand".