221212220020022 has 64 divisors (see below), whose sum is σ = 427044575858688. Its totient is φ = 83405590272000.

The previous prime is 221212220019983. The next prime is 221212220020027. The reversal of 221212220020022 is 220020022212122.

It is a junction number, because it is equal to n+sod(n) for n = 221212220019976 and 221212220020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212220020027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 960036458 + ... + 960266850.

It is an arithmetic number, because the mean of its divisors is an integer number (6672571497792).

Almost surely, 2^{221212220020022} is an apocalyptic number.

221212220020022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221212220020022 is a deficient number, since it is larger than the sum of its proper divisors (205832355838666).

221212220020022 is a wasteful number, since it uses less digits than its factorization.

221212220020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431565.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221212220020022 its reverse (220020022212122), we get a palindrome (441232242232144).

The spelling of 221212220020022 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twenty million, twenty thousand, twenty-two".