35811399121 has 3 divisors (see below), whose sum is σ = 35811588361. Its totient is φ = 35811209882.

The previous prime is 35811399109. The next prime is 35811399293. The reversal of 35811399121 is 12199311853.

The square root of 35811399121 is 189239.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 35811399121 - 2²⁹ = 35274528209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35811399721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 94620 + ... + 283858.

Almost surely, 2^35811399121 is an apocalyptic number.

35811399121 is the 189239-th square number.

35811399121 is the 94620-th centered octagonal number.

It is an amenable number.

35811399121 is a deficient number, since it is larger than the sum of its proper divisors (189240).

35811399121 is an frugal number, since it uses more digits than its factorization.

35811399121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378478 (or 189239 counting only the distinct ones).

The product of its digits is 58320, while the sum is 43.

The spelling of 35811399121 in words is "thirty-five billion, eight hundred eleven million, three hundred ninety-nine thousand, one hundred twenty-one".