222122011021221 has 32 divisors (see below), whose sum is σ = 299462822461440. Its totient is φ = 146439811544000.

The previous prime is 222122011021159. The next prime is 222122011021237. The reversal of 222122011021221 is 122120110221222.

It is a cyclic number.

It is not a de Polignac number, because 222122011021221 - 2¹⁰ = 222122011020197 is a prime.

It is a super-2 number, since 2×222122011021221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222122011021021) 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, 172606315 + ... + 173888423.

It is an arithmetic number, because the mean of its divisors is an integer number (9358213201920).

Almost surely, 2^{222122011021221} is an apocalyptic number.

It is an amenable number.

222122011021221 is a deficient number, since it is larger than the sum of its proper divisors (77340811440219).

222122011021221 is a wasteful number, since it uses less digits than its factorization.

222122011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283777.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222122011021221 its reverse (122120110221222), we get a palindrome (344242121242443).

The spelling of 222122011021221 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, eleven million, twenty-one thousand, two hundred twenty-one".