1023121161 has 12 divisors (see below), whose sum is σ = 1481276160. Its totient is φ = 680495640.

The previous prime is 1023121153. The next prime is 1023121181. The reversal of 1023121161 is 1611213201.

It is not a de Polignac number, because 1023121161 - 2³ = 1023121153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1023121111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128001 + ... + 135758.

It is an arithmetic number, because the mean of its divisors is an integer number (123439680).

Almost surely, 2^1023121161 is an apocalyptic number.

It is an amenable number.

1023121161 is a deficient number, since it is larger than the sum of its proper divisors (458154999).

1023121161 is a wasteful number, since it uses less digits than its factorization.

1023121161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264196 (or 264193 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1023121161 is about 31986.2651930481. The cubic root of 1023121161 is about 1007.6484064070.

Adding to 1023121161 its reverse (1611213201), we get a palindrome (2634334362).

The spelling of 1023121161 in words is "one billion, twenty-three million, one hundred twenty-one thousand, one hundred sixty-one".