11901921269 has 8 divisors (see below), whose sum is σ = 13609190400. Its totient is φ = 10196400816.

The previous prime is 11901921259. The next prime is 11901921277. The reversal of 11901921269 is 96212910911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11901921269 - 2⁴ = 11901921253 is a prime.

It is a super-2 number, since 2×11901921269² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11901921259) 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, 422549 + ... + 449834.

It is an arithmetic number, because the mean of its divisors is an integer number (1701148800).

Almost surely, 2^11901921269 is an apocalyptic number.

It is an amenable number.

11901921269 is a deficient number, since it is larger than the sum of its proper divisors (1707269131).

11901921269 is an equidigital number, since it uses as much as digits as its factorization.

11901921269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874339.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 11901921269 in words is "eleven billion, nine hundred one million, nine hundred twenty-one thousand, two hundred sixty-nine".