1222142131 has 4 divisors (see below), whose sum is σ = 1396733872. Its totient is φ = 1047550392.

The previous prime is 1222142113. The next prime is 1222142147. The reversal of 1222142131 is 1312412221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312412221 = 9203 ⋅142607.

It is not a de Polignac number, because 1222142131 - 2⁷ = 1222142003 is a prime.

It is a super-2 number, since 2×1222142131² = 2987262776730442322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222142099 and 1222142108.

It is not an unprimeable number, because it can be changed into a prime (1222142101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87295860 + ... + 87295873.

It is an arithmetic number, because the mean of its divisors is an integer number (349183468).

Almost surely, 2^1222142131 is an apocalyptic number.

1222142131 is a deficient number, since it is larger than the sum of its proper divisors (174591741).

1222142131 is an equidigital number, since it uses as much as digits as its factorization.

1222142131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174591740.

The product of its digits is 192, while the sum is 19.

The square root of 1222142131 is about 34959.1494604774. The cubic root of 1222142131 is about 1069.1547553662.

Adding to 1222142131 its reverse (1312412221), we get a palindrome (2534554352).

The spelling of 1222142131 in words is "one billion, two hundred twenty-two million, one hundred forty-two thousand, one hundred thirty-one".