1121400631 has 12 divisors (see below), whose sum is σ = 1282884232. Its totient is φ = 974245248.

The previous prime is 1121400629. The next prime is 1121400647. The reversal of 1121400631 is 1360041211.

It is not a de Polignac number, because 1121400631 - 2¹ = 1121400629 is a prime.

It is a super-2 number, since 2×1121400631² = 2515078750414396322, 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 = 1121400599 and 1121400608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121400601) 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, 145485 + ... + 152998.

Almost surely, 2^1121400631 is an apocalyptic number.

1121400631 is a deficient number, since it is larger than the sum of its proper divisors (161483601).

1121400631 is a wasteful number, since it uses less digits than its factorization.

1121400631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298530 (or 298513 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1121400631 is about 33487.3204511797. The cubic root of 1121400631 is about 1038.9315429074.

Adding to 1121400631 its reverse (1360041211), we get a palindrome (2481441842).

The spelling of 1121400631 in words is "one billion, one hundred twenty-one million, four hundred thousand, six hundred thirty-one".