1000986521221 has 4 divisors (see below), whose sum is σ = 1000989946944. Its totient is φ = 1000983095500.

The previous prime is 1000986521209. The next prime is 1000986521251. The reversal of 1000986521221 is 1221256890001.

1000986521221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000986521221 is a prime.

It is a super-2 number, since 2×1000986521221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000986521251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229005 + ... + 1874146.

It is an arithmetic number, because the mean of its divisors is an integer number (250247486736).

Almost surely, 2^{1000986521221} is an apocalyptic number.

It is an amenable number.

1000986521221 is a deficient number, since it is larger than the sum of its proper divisors (3425723).

1000986521221 is an equidigital number, since it uses as much as digits as its factorization.

1000986521221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425722.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 1000986521221 in words is "one trillion, nine hundred eighty-six million, five hundred twenty-one thousand, two hundred twenty-one".