211221211101203 has 4 divisors (see below), whose sum is σ = 211221246760680. Its totient is φ = 211221175441728.

The previous prime is 211221211101169. The next prime is 211221211101211. The reversal of 211221211101203 is 302101112122112.

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 211221211101203 - 2⁶ = 211221211101139 is a prime.

It is a super-2 number, since 2×211221211101203² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221211101293) 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, 6577913 + ... + 21580346.

It is an arithmetic number, because the mean of its divisors is an integer number (52805311690170).

Almost surely, 2^{211221211101203} is an apocalyptic number.

211221211101203 is a deficient number, since it is larger than the sum of its proper divisors (35659477).

211221211101203 is an equidigital number, since it uses as much as digits as its factorization.

211221211101203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35659476.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211221211101203 its reverse (302101112122112), we get a palindrome (513322323223315).

The spelling of 211221211101203 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, two hundred three".