221211210219999 has 32 divisors (see below), whose sum is σ = 300310798993920. Its totient is φ = 144810112540800.

The previous prime is 221211210219971. The next prime is 221211210220009. The reversal of 221211210219999 is 999912012112122.

It is not a de Polignac number, because 221211210219999 - 2⁸ = 221211210219743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211210319999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137201869 + ... + 138804809.

It is an arithmetic number, because the mean of its divisors is an integer number (9384712468560).

Almost surely, 2^{221211210219999} is an apocalyptic number.

221211210219999 is a deficient number, since it is larger than the sum of its proper divisors (79099588773921).

221211210219999 is a wasteful number, since it uses less digits than its factorization.

221211210219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605631.

The product of its (nonzero) digits is 209952, while the sum is 51.

The spelling of 221211210219999 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred ten million, two hundred nineteen thousand, nine hundred ninety-nine".