221000100993 has 12 divisors (see below), whose sum is σ = 364825563648. Its totient is φ = 126285771960.

The previous prime is 221000100983. The next prime is 221000101001. The reversal of 221000100993 is 399001000122.

It is not a de Polignac number, because 221000100993 - 2¹⁷ = 220999969921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221000100913) 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, 1753968993 + ... + 1753969118.

It is an arithmetic number, because the mean of its divisors is an integer number (30402130304).

Almost surely, 2^221000100993 is an apocalyptic number.

It is an amenable number.

221000100993 is a deficient number, since it is larger than the sum of its proper divisors (143825462655).

221000100993 is a wasteful number, since it uses less digits than its factorization.

221000100993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507938124 (or 3507938121 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The spelling of 221000100993 in words is "two hundred twenty-one billion, one hundred thousand, nine hundred ninety-three".