211212010221020 has 48 divisors (see below), whose sum is σ = 466891555485600. Its totient is φ = 80037918535680.

The previous prime is 211212010221019. The next prime is 211212010221061. The reversal of 211212010221020 is 20122010212112.

It is a super-2 number, since 2×211212010221020² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212010221020.

It is a congruent number.

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, 109640696 + ... + 111550464.

It is an arithmetic number, because the mean of its divisors is an integer number (9726907405950).

Almost surely, 2^{211212010221020} is an apocalyptic number.

211212010221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212010221020 is an abundant number, since it is smaller than the sum of its proper divisors (255679545264580).

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

211212010221020 is a wasteful number, since it uses less digits than its factorization.

211212010221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200838 (or 2200836 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212010221020 its reverse (20122010212112), we get a palindrome (231334020433132).

The spelling of 211212010221020 in words is "two hundred eleven trillion, two hundred twelve billion, ten million, two hundred twenty-one thousand, twenty".