1203231130021 has 2 divisors, whose sum is σ = 1203231130022. Its totient is φ = 1203231130020.

The previous prime is 1203231129959. The next prime is 1203231130033. The reversal of 1203231130021 is 1200311323021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856411430625 + 346819699396 = 925425^2 + 588914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203231130021 is a prime.

It is a super-2 number, since 2×1203231130021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203231170021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601615565010 + 601615565011.

It is an arithmetic number, because the mean of its divisors is an integer number (601615565011).

Almost surely, 2^{1203231130021} is an apocalyptic number.

It is an amenable number.

1203231130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203231130021 is an equidigital number, since it uses as much as digits as its factorization.

1203231130021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1203231130021 its reverse (1200311323021), we get a palindrome (2403542453042).

The spelling of 1203231130021 in words is "one trillion, two hundred three billion, two hundred thirty-one million, one hundred thirty thousand, twenty-one".