221212200222101 has 32 divisors (see below), whose sum is σ = 257677016002560. Its totient is φ = 187880475182400.

The previous prime is 221212200222019. The next prime is 221212200222103. The reversal of 221212200222101 is 101222002212122.

It is not a de Polignac number, because 221212200222101 - 2⁴² = 216814153710997 is a prime.

It is a super-3 number, since 3×221212200222101³ (a number of 44 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212200222103) 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, 500441540 + ... + 500883378.

It is an arithmetic number, because the mean of its divisors is an integer number (8052406750080).

Almost surely, 2^{221212200222101} is an apocalyptic number.

It is an amenable number.

221212200222101 is a deficient number, since it is larger than the sum of its proper divisors (36464815780459).

221212200222101 is a wasteful number, since it uses less digits than its factorization.

221212200222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487937.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221212200222101 its reverse (101222002212122), we get a palindrome (322434202434223).

The spelling of 221212200222101 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred million, two hundred twenty-two thousand, one hundred one".