11831021031 has 8 divisors (see below), whose sum is σ = 15779255920. Its totient is φ = 7885066752.

The previous prime is 11831021003. The next prime is 11831021051. The reversal of 11831021031 is 13012013811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11831021031 - 2¹⁰ = 11831020007 is a prime.

It is a super-2 number, since 2×11831021031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11831020989 and 11831021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11831021051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558010 + ... + 578823.

It is an arithmetic number, because the mean of its divisors is an integer number (1972406990).

Almost surely, 2^11831021031 is an apocalyptic number.

11831021031 is a deficient number, since it is larger than the sum of its proper divisors (3948234889).

11831021031 is a wasteful number, since it uses less digits than its factorization.

11831021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140305.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11831021031 its reverse (13012013811), we get a palindrome (24843034842).

The spelling of 11831021031 in words is "eleven billion, eight hundred thirty-one million, twenty-one thousand, thirty-one".