1031230121 has 4 divisors (see below), whose sum is σ = 1031526852. Its totient is φ = 1030933392.

The previous prime is 1031230103. The next prime is 1031230147. The reversal of 1031230121 is 1210321301.

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 806560000 + 224670121 = 28400^2 + 14989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031230121 - 2¹⁰ = 1031229097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031230096 and 1031230105.

It is not an unprimeable number, because it can be changed into a prime (1031238121) 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, 143090 + ... + 150123.

It is an arithmetic number, because the mean of its divisors is an integer number (257881713).

Almost surely, 2^1031230121 is an apocalyptic number.

It is an amenable number.

1031230121 is a deficient number, since it is larger than the sum of its proper divisors (296731).

1031230121 is an equidigital number, since it uses as much as digits as its factorization.

1031230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296730.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1031230121 is about 32112.7719295610. The cubic root of 1031230121 is about 1010.3035133312.

Adding to 1031230121 its reverse (1210321301), we get a palindrome (2241551422).

The spelling of 1031230121 in words is "one billion, thirty-one million, two hundred thirty thousand, one hundred twenty-one".