1520202442081 has 2 divisors, whose sum is σ = 1520202442082. Its totient is φ = 1520202442080.

The previous prime is 1520202442039. The next prime is 1520202442091. The reversal of 1520202442081 is 1802442020251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1423284790225 + 96917651856 = 1193015^2 + 311316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520202442081 is a prime.

It is a super-2 number, since 2×1520202442081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1520202442091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760101221040 + 760101221041.

It is an arithmetic number, because the mean of its divisors is an integer number (760101221041).

Almost surely, 2^{1520202442081} is an apocalyptic number.

It is an amenable number.

1520202442081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520202442081 is an equidigital number, since it uses as much as digits as its factorization.

1520202442081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10240, while the sum is 31.

The spelling of 1520202442081 in words is "one trillion, five hundred twenty billion, two hundred two million, four hundred forty-two thousand, eighty-one".