11213123251 has 16 divisors (see below), whose sum is σ = 12689510400. Its totient is φ = 9819201600.

The previous prime is 11213123213. The next prime is 11213123263. The reversal of 11213123251 is 15232131211.

It is a cyclic number.

It is not a de Polignac number, because 11213123251 - 2²⁵ = 11179568819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213123351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121731 + ... + 192988.

It is an arithmetic number, because the mean of its divisors is an integer number (793094400).

Almost surely, 2^11213123251 is an apocalyptic number.

11213123251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11213123251 is a deficient number, since it is larger than the sum of its proper divisors (1476387149).

11213123251 is a wasteful number, since it uses less digits than its factorization.

11213123251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314850.

The product of its digits is 360, while the sum is 22.

Adding to 11213123251 its reverse (15232131211), we get a palindrome (26445254462).

The spelling of 11213123251 in words is "eleven billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred fifty-one".