211222010220021 has 48 divisors (see below), whose sum is σ = 310317336576000. Its totient is φ = 138421857843360.

The previous prime is 211222010220017. The next prime is 211222010220079. The reversal of 211222010220021 is 120022010222112.

It is a happy number.

211222010220021 is a `hidden beast` number, since 211 + 2 + 220 + 10 + 2 + 200 + 21 = 666.

It is not a de Polignac number, because 211222010220021 - 2² = 211222010220017 is a prime.

It is a super-2 number, since 2×211222010220021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222010219976 and 211222010220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222010220721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 837793860 + ... + 838045938.

It is an arithmetic number, because the mean of its divisors is an integer number (6464944512000).

Almost surely, 2^{211222010220021} is an apocalyptic number.

It is an amenable number.

211222010220021 is a deficient number, since it is larger than the sum of its proper divisors (99095326355979).

211222010220021 is a wasteful number, since it uses less digits than its factorization.

211222010220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257334 (or 257331 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211222010220021 its reverse (120022010222112), we get a palindrome (331244020442133).

The spelling of 211222010220021 in words is "two hundred eleven trillion, two hundred twenty-two billion, ten million, two hundred twenty thousand, twenty-one".