1222131 has 4 divisors (see below), whose sum is σ = 1629512. Its totient is φ = 814752.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222131 is 1312221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1222131 - 2¹ = 1222129 is a prime.

It is a super-2 number, since 2×1222131² = 2987208362322, which contains 22 as substring.

It is a D-number.

It is the 1106-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222171) by changing a digit.

It is a nontrivial repunit in base 1105.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203686 + ... + 203691.

It is an arithmetic number, because the mean of its divisors is an integer number (407378).

2^1222131 is an apocalyptic number.

1222131 is a deficient number, since it is larger than the sum of its proper divisors (407381).

1222131 is an equidigital number, since it uses as much as digits as its factorization.

1222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407380.

The product of its digits is 24, while the sum is 12.

The square root of 1222131 is about 1105.5003392130. The cubic root of 1222131 is about 106.9151509481.

Adding to 1222131 its reverse (1312221), we get a palindrome (2534352).

The spelling of 1222131 in words is "one million, two hundred twenty-two thousand, one hundred thirty-one".