1222313121 has 6 divisors (see below), whose sum is σ = 1765563410. Its totient is φ = 814875408.

The previous prime is 1222313119. The next prime is 1222313129. The reversal of 1222313121 is 1213132221.

1222313121 is a `hidden beast` number, since 122 + 231 + 312 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1066936896 + 155376225 = 32664^2 + 12465^2 .

It is not a de Polignac number, because 1222313121 - 2¹ = 1222313119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222313094 and 1222313103.

It is not an unprimeable number, because it can be changed into a prime (1222313129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67906276 + ... + 67906293.

Almost surely, 2^1222313121 is an apocalyptic number.

It is an amenable number.

1222313121 is a deficient number, since it is larger than the sum of its proper divisors (543250289).

1222313121 is a wasteful number, since it uses less digits than its factorization.

1222313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135812575 (or 135812572 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1222313121 is about 34961.5949435949. The cubic root of 1222313121 is about 1069.2046148825.

Adding to 1222313121 its reverse (1213132221), we get a palindrome (2435445342).

Subtracting from 1222313121 its reverse (1213132221), we obtain a square (9180900 = 3030²).

The spelling of 1222313121 in words is "one billion, two hundred twenty-two million, three hundred thirteen thousand, one hundred twenty-one".