11211255397 has 8 divisors (see below), whose sum is σ = 11296776600. Its totient is φ = 11125787904.

The previous prime is 11211255389. The next prime is 11211255427. The reversal of 11211255397 is 79355211211.

It can be written as a sum of positive squares in 4 ways, for example, as 545736321 + 10665519076 = 23361^2 + 103274^2 .

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 11211255397 - 2³ = 11211255389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211255347) 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, 471879 + ... + 495067.

It is an arithmetic number, because the mean of its divisors is an integer number (1412097075).

Almost surely, 2^11211255397 is an apocalyptic number.

It is an amenable number.

11211255397 is a deficient number, since it is larger than the sum of its proper divisors (85521203).

11211255397 is a wasteful number, since it uses less digits than its factorization.

11211255397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26855.

The product of its digits is 18900, while the sum is 37.

The spelling of 11211255397 in words is "eleven billion, two hundred eleven million, two hundred fifty-five thousand, three hundred ninety-seven".