221221011899 has 8 divisors (see below), whose sum is σ = 222204818160. Its totient is φ = 220237499776.

The previous prime is 221221011889. The next prime is 221221011923. The reversal of 221221011899 is 998110122122.

221221011899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221221011899 - 2⁸ = 221221011643 is a prime.

It is a super-2 number, since 2×221221011899² (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 (221221011839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509479 + ... + 1649535.

It is an arithmetic number, because the mean of its divisors is an integer number (27775602270).

Almost surely, 2^221221011899 is an apocalyptic number.

221221011899 is a deficient number, since it is larger than the sum of its proper divisors (983806261).

221221011899 is a wasteful number, since it uses less digits than its factorization.

221221011899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147069.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 221221011899 in words is "two hundred twenty-one billion, two hundred twenty-one million, eleven thousand, eight hundred ninety-nine".