11401331021 has 2 divisors, whose sum is σ = 11401331022. Its totient is φ = 11401331020.

The previous prime is 11401330987. The next prime is 11401331059. The reversal of 11401331021 is 12013310411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8829421225 + 2571909796 = 93965^2 + 50714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11401331021 - 2⁶ = 11401330957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11401331521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5700665510 + 5700665511.

It is an arithmetic number, because the mean of its divisors is an integer number (5700665511).

Almost surely, 2^11401331021 is an apocalyptic number.

It is an amenable number.

11401331021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11401331021 is an equidigital number, since it uses as much as digits as its factorization.

11401331021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11401331021 its reverse (12013310411), we get a palindrome (23414641432).

The spelling of 11401331021 in words is "eleven billion, four hundred one million, three hundred thirty-one thousand, twenty-one".