1222220131 has 4 divisors (see below), whose sum is σ = 1333331064. Its totient is φ = 1111109200.

The previous prime is 1222220113. The next prime is 1222220137. The reversal of 1222220131 is 1310222221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1222220131 - 2¹⁹ = 1221695843 is a prime.

It is a super-2 number, since 2×1222220131² = 2987644097243314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222220137) 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, 55555450 + ... + 55555471.

It is an arithmetic number, because the mean of its divisors is an integer number (333332766).

Almost surely, 2^1222220131 is an apocalyptic number.

1222220131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222220131 is a deficient number, since it is larger than the sum of its proper divisors (111110933).

1222220131 is a wasteful number, since it uses less digits than its factorization.

1222220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111110932.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1222220131 is about 34960.2650304599. The cubic root of 1222220131 is about 1069.1775002103.

Adding to 1222220131 its reverse (1310222221), we get a palindrome (2532442352).

The spelling of 1222220131 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred thirty-one".