1121244931 has 4 divisors (see below), whose sum is σ = 1122868264. Its totient is φ = 1119621600.

The previous prime is 1121244907. The next prime is 1121244947. The reversal of 1121244931 is 1394421211.

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 1121244931 - 2¹¹ = 1121242883 is a prime.

It is a super-2 number, since 2×1121244931² = 2514380390586389522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121244931.

It is not an unprimeable number, because it can be changed into a prime (1121244991) 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, 810630 + ... + 812011.

It is an arithmetic number, because the mean of its divisors is an integer number (280717066).

Almost surely, 2^1121244931 is an apocalyptic number.

1121244931 is a deficient number, since it is larger than the sum of its proper divisors (1623333).

1121244931 is an equidigital number, since it uses as much as digits as its factorization.

1121244931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623332.

The product of its digits is 1728, while the sum is 28.

The square root of 1121244931 is about 33484.9956099743. The cubic root of 1121244931 is about 1038.8834574674.

It can be divided in two parts, 11212449 and 31, that added together give a triangular number (11212480 = T₄₇₃₅).

The spelling of 1121244931 in words is "one billion, one hundred twenty-one million, two hundred forty-four thousand, nine hundred thirty-one".