1101220031 has 12 divisors (see below), whose sum is σ = 1168146000. Its totient is φ = 1037950848.

The previous prime is 1101220027. The next prime is 1101220039. The reversal of 1101220031 is 1300221011.

It is not a de Polignac number, because 1101220031 - 2² = 1101220027 is a prime.

It is a super-2 number, since 2×1101220031² = 2425371113351281922, 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 = 1101219994 and 1101220021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101220039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64175 + ... + 79503.

It is an arithmetic number, because the mean of its divisors is an integer number (97345500).

Almost surely, 2^1101220031 is an apocalyptic number.

1101220031 is a deficient number, since it is larger than the sum of its proper divisors (66925969).

1101220031 is a wasteful number, since it uses less digits than its factorization.

1101220031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15566 (or 15547 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1101220031 is about 33184.6354658297. The cubic root of 1101220031 is about 1032.6616149761.

Adding to 1101220031 its reverse (1300221011), we get a palindrome (2401441042).

The spelling of 1101220031 in words is "one billion, one hundred one million, two hundred twenty thousand, thirty-one".