11311021255 has 8 divisors (see below), whose sum is σ = 13581896832. Its totient is φ = 9043036128.

The previous prime is 11311021231. The next prime is 11311021279. The reversal of 11311021255 is 55212011311.

It is an interprime number because it is at equal distance from previous prime (11311021231) and next prime (11311021279).

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

It is a cyclic number.

It is not a de Polignac number, because 11311021255 - 2¹⁷ = 11310890183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713992 + ... + 729661.

It is an arithmetic number, because the mean of its divisors is an integer number (1697737104).

Almost surely, 2^11311021255 is an apocalyptic number.

11311021255 is a deficient number, since it is larger than the sum of its proper divisors (2270875577).

11311021255 is a wasteful number, since it uses less digits than its factorization.

11311021255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445225.

The product of its (nonzero) digits is 300, while the sum is 22.

Adding to 11311021255 its reverse (55212011311), we get a palindrome (66523032566).

The spelling of 11311021255 in words is "eleven billion, three hundred eleven million, twenty-one thousand, two hundred fifty-five".