212110021000 has 64 divisors (see below), whose sum is σ = 496417062960. Its totient is φ = 84830400000.

The previous prime is 212110020979. The next prime is 212110021009. The reversal of 212110021000 is 120011212.

It can be written as a sum of positive squares in 8 ways, for example, as 41942220804 + 170167800196 = 204798^2 + 412514^2 .

It is a super-2 number, since 2×212110021000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (212110021009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8208100 + ... + 8233900.

Almost surely, 2^212110021000 is an apocalyptic number.

212110021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212110021000 is an abundant number, since it is smaller than the sum of its proper divisors (284307041960).

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

212110021000 is a wasteful number, since it uses less digits than its factorization.

212110021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34043 (or 34029 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 212110021000 its reverse (120011212), we get a palindrome (212230032212).

The spelling of 212110021000 in words is "two hundred twelve billion, one hundred ten million, twenty-one thousand".