1290921322873 has 16 divisors (see below), whose sum is σ = 1611204086016. Its totient is φ = 1007002543680.

The previous prime is 1290921322807. The next prime is 1290921322913. The reversal of 1290921322873 is 3782231290921.

It is not a de Polignac number, because 1290921322873 - 2¹³ = 1290921314681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1290921322973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99894586 + ... + 99907507.

It is an arithmetic number, because the mean of its divisors is an integer number (100700255376).

Almost surely, 2^{1290921322873} is an apocalyptic number.

1290921322873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1290921322873 is a deficient number, since it is larger than the sum of its proper divisors (320282763143).

1290921322873 is a wasteful number, since it uses less digits than its factorization.

1290921322873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199802184.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 1290921322873 in words is "one trillion, two hundred ninety billion, nine hundred twenty-one million, three hundred twenty-two thousand, eight hundred seventy-three".