221111212003 has 16 divisors (see below), whose sum is σ = 241826757120. Its totient is φ = 200498557600.

The previous prime is 221111211953. The next prime is 221111212043. The reversal of 221111212003 is 300212111122.

It is a de Polignac number, because none of the positive numbers 2^k-221111212003 is a prime.

It is a super-2 number, since 2×221111212003² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221111212043) 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, 10465176 + ... + 10486282.

It is an arithmetic number, because the mean of its divisors is an integer number (15114172320).

Almost surely, 2^221111212003 is an apocalyptic number.

221111212003 is a deficient number, since it is larger than the sum of its proper divisors (20715545117).

221111212003 is a wasteful number, since it uses less digits than its factorization.

221111212003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23498.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221111212003 its reverse (300212111122), we get a palindrome (521323323125).

The spelling of 221111212003 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, three".