11211055551391 has 8 divisors (see below), whose sum is σ = 11215333825040. Its totient is φ = 11206777716288.

The previous prime is 11211055551349. The next prime is 11211055551407. The reversal of 11211055551391 is 19315555011211.

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 11211055551391 - 2⁴³ = 2414962529183 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 (11211055551331) 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, 56537680 + ... + 56735626.

It is an arithmetic number, because the mean of its divisors is an integer number (1401916728130).

Almost surely, 2^{11211055551391} is an apocalyptic number.

11211055551391 is a deficient number, since it is larger than the sum of its proper divisors (4278273649).

11211055551391 is a wasteful number, since it uses less digits than its factorization.

11211055551391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219273.

The product of its (nonzero) digits is 33750, while the sum is 40.

The spelling of 11211055551391 in words is "eleven trillion, two hundred eleven billion, fifty-five million, five hundred fifty-one thousand, three hundred ninety-one".