221212022 has 16 divisors (see below), whose sum is σ = 364469760. Its totient is φ = 100228392.

The previous prime is 221212021. The next prime is 221212031. The reversal of 221212022 is 220212122.

It is a junction number, because it is equal to n+sod(n) for n = 221211988 and 221212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125678 + ... + 127425.

It is an arithmetic number, because the mean of its divisors is an integer number (22779360).

Almost surely, 2^221212022 is an apocalyptic number.

221212022 is a deficient number, since it is larger than the sum of its proper divisors (143257738).

221212022 is a wasteful number, since it uses less digits than its factorization.

221212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253147.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221212022 is about 14873.1981093509. The cubic root of 221212022 is about 604.7876421561.

Adding to 221212022 its reverse (220212122), we get a palindrome (441424144).

The spelling of 221212022 in words is "two hundred twenty-one million, two hundred twelve thousand, twenty-two".