221011212203 has 4 divisors (see below), whose sum is σ = 224309887080. Its totient is φ = 217712537328.

The previous prime is 221011212193. The next prime is 221011212209. The reversal of 221011212203 is 302212110122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221011212203 - 2⁸ = 221011211947 is a prime.

It is a super-2 number, since 2×221011212203² (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 (221011212209) 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, 1649337338 + ... + 1649337471.

It is an arithmetic number, because the mean of its divisors is an integer number (56077471770).

Almost surely, 2^221011212203 is an apocalyptic number.

221011212203 is a deficient number, since it is larger than the sum of its proper divisors (3298674877).

221011212203 is an equidigital number, since it uses as much as digits as its factorization.

221011212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298674876.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221011212203 its reverse (302212110122), we get a palindrome (523223322325).

The spelling of 221011212203 in words is "two hundred twenty-one billion, eleven million, two hundred twelve thousand, two hundred three".