1220342031 has 20 divisors (see below), whose sum is σ = 1839126432. Its totient is φ = 806355648.

The previous prime is 1220342009. The next prime is 1220342033. The reversal of 1220342031 is 1302430221.

1220342031 is a `hidden beast` number, since 12 + 203 + 420 + 31 = 666.

It is not a de Polignac number, because 1220342031 - 2¹⁰ = 1220341007 is a prime.

It is a super-2 number, since 2×1220342031² = 2978469345250409922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220341995 and 1220342013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220342033) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57511 + ... + 75816.

Almost surely, 2^1220342031 is an apocalyptic number.

1220342031 is a deficient number, since it is larger than the sum of its proper divisors (618784401).

1220342031 is a wasteful number, since it uses less digits than its factorization.

1220342031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133452 (or 133443 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1220342031 is about 34933.3942095526. The cubic root of 1220342031 is about 1068.6295760898.

Adding to 1220342031 its reverse (1302430221), we get a palindrome (2522772252).

The spelling of 1220342031 in words is "one billion, two hundred twenty million, three hundred forty-two thousand, thirty-one".