11121951 has 4 divisors (see below), whose sum is σ = 14829272. Its totient is φ = 7414632.

The previous prime is 11121919. The next prime is 11121953. The reversal of 11121951 is 15912111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11121951 - 2⁵ = 11121919 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 (11121953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853656 + ... + 1853661.

It is an arithmetic number, because the mean of its divisors is an integer number (3707318).

Almost surely, 2^11121951 is an apocalyptic number.

11121951 is a deficient number, since it is larger than the sum of its proper divisors (3707321).

11121951 is an equidigital number, since it uses as much as digits as its factorization.

11121951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707320.

The product of its digits is 90, while the sum is 21.

The square root of 11121951 is about 3334.9589202867. The cubic root of 11121951 is about 223.2168588967.

The spelling of 11121951 in words is "eleven million, one hundred twenty-one thousand, nine hundred fifty-one".