212220121000 has 32 divisors (see below), whose sum is σ = 496595085480. Its totient is φ = 84888048000.

The previous prime is 212220120989. The next prime is 212220121013. The reversal of 212220121000 is 121022212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 115699301316 + 96520819684 = 340146^2 + 310678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106109061 + ... + 106111060.

Almost surely, 2^212220121000 is an apocalyptic number.

212220121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212220121000 is an abundant number, since it is smaller than the sum of its proper divisors (284374964480).

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

212220121000 is a wasteful number, since it uses less digits than its factorization.

212220121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212220142 (or 212220128 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212220121000 its reverse (121022212), we get a palindrome (212341143212).

The spelling of 212220121000 in words is "two hundred twelve billion, two hundred twenty million, one hundred twenty-one thousand".