222122001221021 has 16 divisors (see below), whose sum is σ = 250671202891200. Its totient is φ = 194965548624000.

The previous prime is 222122001220979. The next prime is 222122001221023. The reversal of 222122001221021 is 120122100221222.

It is a de Polignac number, because none of the positive numbers 2^k-222122001221021 is a prime.

It is a super-2 number, since 2×222122001221021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222122001220984 and 222122001221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122001221023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233224490 + ... + 234174948.

It is an arithmetic number, because the mean of its divisors is an integer number (15666950180700).

Almost surely, 2^{222122001221021} is an apocalyptic number.

It is an amenable number.

222122001221021 is a deficient number, since it is larger than the sum of its proper divisors (28549201670179).

222122001221021 is a wasteful number, since it uses less digits than its factorization.

222122001221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683100.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222122001221021 its reverse (120122100221222), we get a palindrome (342244101442243).

The spelling of 222122001221021 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, one million, two hundred twenty-one thousand, twenty-one".