11621100031 has 2 divisors, whose sum is σ = 11621100032. Its totient is φ = 11621100030.

The previous prime is 11621100019. The next prime is 11621100047. The reversal of 11621100031 is 13000112611.

It is an a-pointer prime, because the next prime (11621100047) can be obtained adding 11621100031 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11621100031 - 2²³ = 11612711423 is a prime.

It is a super-3 number, since 3×11621100031³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 11621099978 and 11621100014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11621100011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810550015 + 5810550016.

It is an arithmetic number, because the mean of its divisors is an integer number (5810550016).

Almost surely, 2^11621100031 is an apocalyptic number.

11621100031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621100031 is an equidigital number, since it uses as much as digits as its factorization.

11621100031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11621100031 its reverse (13000112611), we get a palindrome (24621212642).

The spelling of 11621100031 in words is "eleven billion, six hundred twenty-one million, one hundred thousand, thirty-one".