212021021000 has 32 divisors (see below), whose sum is σ = 496129191480. Its totient is φ = 84808408000.

The previous prime is 212021020951. The next prime is 212021021011. The reversal of 212021021000 is 120120212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39641606404 + 172379414596 = 199102^2 + 415186^2 .

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, 106009511 + ... + 106011510.

Almost surely, 2^212021021000 is an apocalyptic number.

212021021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021021000 is an abundant number, since it is smaller than the sum of its proper divisors (284108170480).

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

212021021000 is a wasteful number, since it uses less digits than its factorization.

212021021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212021042 (or 212021028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212021021000 its reverse (120120212), we get a palindrome (212141141212).

The spelling of 212021021000 in words is "two hundred twelve billion, twenty-one million, twenty-one thousand".