211221012020022 has 20 divisors (see below), whose sum is σ = 473291526934116. Its totient is φ = 70407004006620.

The previous prime is 211221012020021. The next prime is 211221012020041. The reversal of 211221012020022 is 220020210122112.

It is a happy number.

211221012020022 is a `hidden beast` number, since 2 + 112 + 210 + 120 + 200 + 22 = 666.

It is a super-2 number, since 2×211221012020022² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211221012019977 and 211221012020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221012020021) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 651916703604 + ... + 651916703927.

Almost surely, 2^{211221012020022} is an apocalyptic number.

211221012020022 is an abundant number, since it is smaller than the sum of its proper divisors (262070514914094).

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

211221012020022 is a wasteful number, since it uses less digits than its factorization.

211221012020022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303833407545 (or 1303833407536 counting only the distinct ones).

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

Adding to 211221012020022 its reverse (220020210122112), we get a palindrome (431241222142134).

The spelling of 211221012020022 in words is "two hundred eleven trillion, two hundred twenty-one billion, twelve million, twenty thousand, twenty-two".