1500221421999 has 12 divisors (see below), whose sum is σ = 2166997487616. Its totient is φ = 1000142542752.

The previous prime is 1500221421961. The next prime is 1500221422013. The reversal of 1500221421999 is 9991241220051.

1500221421999 is a `hidden beast` number, since 1 + 500 + 2 + 2 + 1 + 42 + 19 + 99 = 666.

It is not a de Polignac number, because 1500221421999 - 2¹¹ = 1500221419951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500221421499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2554099 + ... + 3086075.

It is an arithmetic number, because the mean of its divisors is an integer number (180583123968).

Almost surely, 2^{1500221421999} is an apocalyptic number.

1500221421999 is a deficient number, since it is larger than the sum of its proper divisors (666776065617).

1500221421999 is a wasteful number, since it uses less digits than its factorization.

1500221421999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845326 (or 845323 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 1500221421999 in words is "one trillion, five hundred billion, two hundred twenty-one million, four hundred twenty-one thousand, nine hundred ninety-nine".