1321421343037 has 2 divisors, whose sum is σ = 1321421343038. Its totient is φ = 1321421343036.

The previous prime is 1321421343023. The next prime is 1321421343083. The reversal of 1321421343037 is 7303431241231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1317385155076 + 4036187961 = 1147774^2 + 63531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321421343037 - 2²³ = 1321412954429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321421342993 and 1321421343011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321421343937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660710671518 + 660710671519.

It is an arithmetic number, because the mean of its divisors is an integer number (660710671519).

Almost surely, 2^{1321421343037} is an apocalyptic number.

It is an amenable number.

1321421343037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321421343037 is an equidigital number, since it uses as much as digits as its factorization.

1321421343037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 1321421343037 its reverse (7303431241231), we get a palindrome (8624852584268).

The spelling of 1321421343037 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, three hundred forty-three thousand, thirty-seven".