11935121071 has 4 divisors (see below), whose sum is σ = 12346677000. Its totient is φ = 11523565144.

The previous prime is 11935121069. The next prime is 11935121089. The reversal of 11935121071 is 17012153911.

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

It is a cyclic number.

It is not a de Polignac number, because 11935121071 - 2¹ = 11935121069 is a prime.

It is a super-2 number, since 2×11935121071² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11935121021) 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, 205777921 + ... + 205777978.

It is an arithmetic number, because the mean of its divisors is an integer number (3086669250).

Almost surely, 2^11935121071 is an apocalyptic number.

11935121071 is a deficient number, since it is larger than the sum of its proper divisors (411555929).

11935121071 is an equidigital number, since it uses as much as digits as its factorization.

11935121071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411555928.

The product of its (nonzero) digits is 1890, while the sum is 31.

Adding to 11935121071 its reverse (17012153911), we get a palindrome (28947274982).

The spelling of 11935121071 in words is "eleven billion, nine hundred thirty-five million, one hundred twenty-one thousand, seventy-one".