221212210122211 has 32 divisors (see below), whose sum is σ = 293987519078400. Its totient is φ = 161233779826080.

The previous prime is 221212210122203. The next prime is 221212210122217. The reversal of 221212210122211 is 112221012212122.

It is a cyclic number.

It is not a de Polignac number, because 221212210122211 - 2³ = 221212210122203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212210122217) 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, 956875045 + ... + 957106198.

It is an arithmetic number, because the mean of its divisors is an integer number (9187109971200).

Almost surely, 2^{221212210122211} is an apocalyptic number.

221212210122211 is a deficient number, since it is larger than the sum of its proper divisors (72775308956189).

221212210122211 is a wasteful number, since it uses less digits than its factorization.

221212210122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913981359.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221212210122211 its reverse (112221012212122), we get a palindrome (333433222334333).

The spelling of 221212210122211 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-two thousand, two hundred eleven".