221111000202001 has 16 divisors (see below), whose sum is σ = 272137539881088. Its totient is φ = 174944373033600.

The previous prime is 221111000201983. The next prime is 221111000202023. The reversal of 221111000202001 is 100202000111122.

It is a cyclic number.

It is not a de Polignac number, because 221111000202001 - 2¹⁵ = 221111000169233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (221111000202061) 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, 23851941 + ... + 31798381.

It is an arithmetic number, because the mean of its divisors is an integer number (17008596242568).

Almost surely, 2^{221111000202001} is an apocalyptic number.

It is an amenable number.

221111000202001 is a deficient number, since it is larger than the sum of its proper divisors (51026539679087).

221111000202001 is a wasteful number, since it uses less digits than its factorization.

221111000202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252232.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221111000202001 its reverse (100202000111122), we get a palindrome (321313000313123).

The spelling of 221111000202001 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred two thousand, one".