221212210201122 has 64 divisors (see below), whose sum is σ = 511313473382400. Its totient is φ = 62492805175680.

The previous prime is 221212210201109. The next prime is 221212210201127. The reversal of 221212210201122 is 221102012212122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (221212210201127) 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, 697647597 + ... + 697964607.

It is an arithmetic number, because the mean of its divisors is an integer number (7989273021600).

Almost surely, 2^{221212210201122} is an apocalyptic number.

221212210201122 is an abundant number, since it is smaller than the sum of its proper divisors (290101263181278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212210201122 is a wasteful number, since it uses less digits than its factorization.

221212210201122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503791.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221212210201122 its reverse (221102012212122), we get a palindrome (442314222413244).

The spelling of 221212210201122 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred ten million, two hundred one thousand, one hundred twenty-two".