1023120121 has 16 divisors (see below), whose sum is σ = 1062432000. Its totient is φ = 984700800.

The previous prime is 1023120053. The next prime is 1023120127. The reversal of 1023120121 is 1210213201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023120127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 974805 + ... + 975853.

It is an arithmetic number, because the mean of its divisors is an integer number (66402000).

Almost surely, 2^1023120121 is an apocalyptic number.

It is an amenable number.

1023120121 is a deficient number, since it is larger than the sum of its proper divisors (39311879).

1023120121 is a wasteful number, since it uses less digits than its factorization.

1023120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1023120121 is about 31986.2489360663. The cubic root of 1023120121 is about 1007.6480649829.

Adding to 1023120121 its reverse (1210213201), we get a palindrome (2233333322).

The spelling of 1023120121 in words is "one billion, twenty-three million, one hundred twenty thousand, one hundred twenty-one".