21001002220108 has 12 divisors (see below), whose sum is σ = 36751821352960. Its totient is φ = 10500481833552.

The previous prime is 21001002220091. The next prime is 21001002220111. The reversal of 21001002220108 is 80102220010012.

It is a super-2 number, since 2×21001002220108² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211003 + ... + 6847666.

Almost surely, 2^{21001002220108} is an apocalyptic number.

It is an amenable number.

21001002220108 is a deficient number, since it is larger than the sum of its proper divisors (15750819132852).

21001002220108 is a wasteful number, since it uses less digits than its factorization.

21001002220108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638256 (or 9638254 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 21001002220108 in words is "twenty-one trillion, one billion, two million, two hundred twenty thousand, one hundred eight".