222121223031 has 16 divisors (see below), whose sum is σ = 299840698080. Its totient is φ = 146245186560.

The previous prime is 222121223011. The next prime is 222121223039. The reversal of 222121223031 is 130322121222.

It is not a de Polignac number, because 222121223031 - 2¹³ = 222121214839 is a prime.

It is a super-2 number, since 2×222121223031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222121222989 and 222121223007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121223039) 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, 259890 + ... + 715391.

It is an arithmetic number, because the mean of its divisors is an integer number (18740043630).

Almost surely, 2^222121223031 is an apocalyptic number.

222121223031 is a deficient number, since it is larger than the sum of its proper divisors (77719475049).

222121223031 is an equidigital number, since it uses as much as digits as its factorization.

222121223031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976226.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 222121223031 its reverse (130322121222), we get a palindrome (352443344253).

The spelling of 222121223031 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-three thousand, thirty-one".