11121232031 has 64 divisors (see below), whose sum is σ = 14310912000. Its totient is φ = 8585740800.

The previous prime is 11121232027. The next prime is 11121232033. The reversal of 11121232031 is 13023212111.

It is not a de Polignac number, because 11121232031 - 2² = 11121232027 is a prime.

It is a super-2 number, since 2×11121232031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121232033) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46146071 + ... + 46146311.

It is an arithmetic number, because the mean of its divisors is an integer number (223608000).

Almost surely, 2^11121232031 is an apocalyptic number.

11121232031 is a deficient number, since it is larger than the sum of its proper divisors (3189679969).

11121232031 is a wasteful number, since it uses less digits than its factorization.

11121232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11121232031 its reverse (13023212111), we get a palindrome (24144444142).

The spelling of 11121232031 in words is "eleven billion, one hundred twenty-one million, two hundred thirty-two thousand, thirty-one".