211221002000022 has 64 divisors (see below), whose sum is σ = 492647591116800. Its totient is φ = 60348385517952.

The previous prime is 211221001999979. The next prime is 211221002000087. The reversal of 211221002000022 is 220000200122112.

It is a super-2 number, since 2×211221002000022² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221001999965 and 211221002000010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327873643 + ... + 328517225.

It is an arithmetic number, because the mean of its divisors is an integer number (7697618611200).

Almost surely, 2^{211221002000022} is an apocalyptic number.

211221002000022 is an abundant number, since it is smaller than the sum of its proper divisors (281426589116778).

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

211221002000022 is a wasteful number, since it uses less digits than its factorization.

211221002000022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803082 (or 803068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 211221002000022 its reverse (220000200122112), we get a palindrome (431221202122134).

The spelling of 211221002000022 in words is "two hundred eleven trillion, two hundred twenty-one billion, two million, twenty-two", and thus it is an aban number.