201231221222 has 4 divisors (see below), whose sum is σ = 301846831836. Its totient is φ = 100615610610.

The previous prime is 201231221197. The next prime is 201231221267. The reversal of 201231221222 is 222122132102.

201231221222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 201231221194 and 201231221203.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50307805304 + ... + 50307805307.

It is an arithmetic number, because the mean of its divisors is an integer number (75461707959).

Almost surely, 2^201231221222 is an apocalyptic number.

201231221222 is a deficient number, since it is larger than the sum of its proper divisors (100615610614).

201231221222 is a wasteful number, since it uses less digits than its factorization.

201231221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100615610613.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 201231221222 its reverse (222122132102), we get a palindrome (423353353324).

The spelling of 201231221222 in words is "two hundred one billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty-two".