222101011111221 has 48 divisors (see below), whose sum is σ = 368202934951488. Its totient is φ = 127774297670400.

The previous prime is 222101011111157. The next prime is 222101011111289. The reversal of 222101011111221 is 122111110101222.

It is a happy number.

222101011111221 is a `hidden beast` number, since 22 + 210 + 101 + 1 + 111 + 221 = 666.

It is not a de Polignac number, because 222101011111221 - 2⁶ = 222101011111157 is a prime.

It is a super-2 number, since 2×222101011111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222101011111194 and 222101011111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101011211221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 739284411 + ... + 739584776.

It is an arithmetic number, because the mean of its divisors is an integer number (7670894478156).

Almost surely, 2^{222101011111221} is an apocalyptic number.

It is an amenable number.

222101011111221 is a deficient number, since it is larger than the sum of its proper divisors (146101923840267).

222101011111221 is a wasteful number, since it uses less digits than its factorization.

222101011111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478869282 (or 1478869279 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 222101011111221 its reverse (122111110101222), we get a palindrome (344212121212443).

The spelling of 222101011111221 in words is "two hundred twenty-two trillion, one hundred one billion, eleven million, one hundred eleven thousand, two hundred twenty-one".