21221112011022 has 96 divisors (see below), whose sum is σ = 57968658858240. Its totient is φ = 5450044786560.

The previous prime is 21221112010999. The next prime is 21221112011063. The reversal of 21221112011022 is 22011021112212.

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 = 21221112010986 and 21221112011004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85893768 + ... + 86140475.

It is an arithmetic number, because the mean of its divisors is an integer number (603840196440).

Almost surely, 2^{21221112011022} is an apocalyptic number.

21221112011022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221112011022 is an abundant number, since it is smaller than the sum of its proper divisors (36747546847218).

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

21221112011022 is a wasteful number, since it uses less digits than its factorization.

21221112011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172034358 (or 172034355 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21221112011022 its reverse (22011021112212), we get a palindrome (43232133123234).

The spelling of 21221112011022 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, eleven thousand, twenty-two".