1331844922901 has 2 divisors, whose sum is σ = 1331844922902. Its totient is φ = 1331844922900.

The previous prime is 1331844922873. The next prime is 1331844922997. The reversal of 1331844922901 is 1092294481331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1130287922500 + 201557000401 = 1063150^2 + 448951^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331844922901 - 2²² = 1331840728597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331844922601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665922461450 + 665922461451.

It is an arithmetic number, because the mean of its divisors is an integer number (665922461451).

Almost surely, 2^{1331844922901} is an apocalyptic number.

It is an amenable number.

1331844922901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331844922901 is an equidigital number, since it uses as much as digits as its factorization.

1331844922901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 1331844922901 in words is "one trillion, three hundred thirty-one billion, eight hundred forty-four million, nine hundred twenty-two thousand, nine hundred one".