11506212157 has 8 divisors (see below), whose sum is σ = 12553101792. Its totient is φ = 10459467600.

The previous prime is 11506212127. The next prime is 11506212197. The reversal of 11506212157 is 75121260511.

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 11506212157 - 2²⁷ = 11371994429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11506212127) 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, 192138 + ... + 244804.

It is an arithmetic number, because the mean of its divisors is an integer number (1569137724).

Almost surely, 2^11506212157 is an apocalyptic number.

It is an amenable number.

11506212157 is a deficient number, since it is larger than the sum of its proper divisors (1046889635).

11506212157 is a wasteful number, since it uses less digits than its factorization.

11506212157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72539.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 11506212157 its reverse (75121260511), we get a palindrome (86627472668).

The spelling of 11506212157 in words is "eleven billion, five hundred six million, two hundred twelve thousand, one hundred fifty-seven".