221212119 has 24 divisors (see below), whose sum is σ = 304210512. Its totient is φ = 142963200.

The previous prime is 221212111. The next prime is 221212129. The reversal of 221212119 is 911212122.

It is not a de Polignac number, because 221212119 - 2³ = 221212111 is a prime.

It is a super-2 number, since 2×221212119² = 97869603184940322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221212095 and 221212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212111) 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 23 ways as a sum of consecutive naturals, for example, 1614619 + ... + 1614755.

It is an arithmetic number, because the mean of its divisors is an integer number (12675438).

Almost surely, 2^221212119 is an apocalyptic number.

221212119 is a deficient number, since it is larger than the sum of its proper divisors (82998393).

221212119 is a wasteful number, since it uses less digits than its factorization.

221212119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 314 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

The square root of 221212119 is about 14873.2013702498. The cubic root of 221212119 is about 604.7877305546.

The spelling of 221212119 in words is "two hundred twenty-one million, two hundred twelve thousand, one hundred nineteen".