1220100031 has 2 divisors, whose sum is σ = 1220100032. Its totient is φ = 1220100030.

The previous prime is 1220100023. The next prime is 1220100041. The reversal of 1220100031 is 1300010221.

It is an a-pointer prime, because the next prime (1220100041) can be obtained adding 1220100031 to its sum of digits (10).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220100031 - 2³ = 1220100023 is a prime.

It is a super-2 number, since 2×1220100031² = 2977288171292401922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220099990 and 1220100017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220100041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610050015 + 610050016.

It is an arithmetic number, because the mean of its divisors is an integer number (610050016).

Almost surely, 2^1220100031 is an apocalyptic number.

1220100031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220100031 is an equidigital number, since it uses as much as digits as its factorization.

1220100031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1220100031 is about 34929.9303033945. The cubic root of 1220100031 is about 1068.5589332025.

Adding to 1220100031 its reverse (1300010221), we get a palindrome (2520110252).

The spelling of 1220100031 in words is "one billion, two hundred twenty million, one hundred thousand, thirty-one".