1020233231261 has 2 divisors, whose sum is σ = 1020233231262. Its totient is φ = 1020233231260.

The previous prime is 1020233231257. The next prime is 1020233231291. The reversal of 1020233231261 is 1621323320201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957254819236 + 62978412025 = 978394^2 + 250955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020233231261 - 2² = 1020233231257 is a prime.

It is a super-2 number, since 2×1020233231261² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1020233231261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020233231291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510116615630 + 510116615631.

It is an arithmetic number, because the mean of its divisors is an integer number (510116615631).

Almost surely, 2^{1020233231261} is an apocalyptic number.

It is an amenable number.

1020233231261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020233231261 is an equidigital number, since it uses as much as digits as its factorization.

1020233231261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 1020233231261 its reverse (1621323320201), we get a palindrome (2641556551462).

The spelling of 1020233231261 in words is "one trillion, twenty billion, two hundred thirty-three million, two hundred thirty-one thousand, two hundred sixty-one".