1023230220121 has 4 divisors (see below), whose sum is σ = 1023232407732. Its totient is φ = 1023228032512.

The previous prime is 1023230220059. The next prime is 1023230220139. The reversal of 1023230220121 is 1210220323201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 382494008521 + 640736211600 = 618461^2 + 800460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023230220121 - 2⁷ = 1023230219993 is a prime.

It is a super-2 number, since 2×1023230220121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023230220151) 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, 77320 + ... + 1432633.

It is an arithmetic number, because the mean of its divisors is an integer number (255808101933).

Almost surely, 2^{1023230220121} is an apocalyptic number.

It is an amenable number.

1023230220121 is a deficient number, since it is larger than the sum of its proper divisors (2187611).

1023230220121 is an equidigital number, since it uses as much as digits as its factorization.

1023230220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187610.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1023230220121 its reverse (1210220323201), we get a palindrome (2233450543322).

The spelling of 1023230220121 in words is "one trillion, twenty-three billion, two hundred thirty million, two hundred twenty thousand, one hundred twenty-one".