1220022131 has 4 divisors (see below), whose sum is σ = 1222657632. Its totient is φ = 1217386632.

The previous prime is 1220022121. The next prime is 1220022149. The reversal of 1220022131 is 1312200221.

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 1220022131 - 2¹⁰ = 1220021107 is a prime.

It is a super-2 number, since 2×1220022131² = 2976908000259562322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220022121) 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, 1317056 + ... + 1317981.

It is an arithmetic number, because the mean of its divisors is an integer number (305664408).

Almost surely, 2^1220022131 is an apocalyptic number.

1220022131 is a deficient number, since it is larger than the sum of its proper divisors (2635501).

1220022131 is an equidigital number, since it uses as much as digits as its factorization.

1220022131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635500.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1220022131 is about 34928.8151960527. The cubic root of 1220022131 is about 1068.5361912113.

Adding to 1220022131 its reverse (1312200221), we get a palindrome (2532222352).

The spelling of 1220022131 in words is "one billion, two hundred twenty million, twenty-two thousand, one hundred thirty-one".