221012222001212 has 12 divisors (see below), whose sum is σ = 387513752015376. Its totient is φ = 110294007139680.

The previous prime is 221012222001209. The next prime is 221012222001349. The reversal of 221012222001212 is 212100222210122.

It is a super-2 number, since 2×221012222001212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53025962888 + ... + 53025967055.

It is an arithmetic number, because the mean of its divisors is an integer number (32292812667948).

Almost surely, 2^{221012222001212} is an apocalyptic number.

It is an amenable number.

221012222001212 is a deficient number, since it is larger than the sum of its proper divisors (166501530014164).

221012222001212 is a wasteful number, since it uses less digits than its factorization.

221012222001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106051930468 (or 106051930466 counting only the distinct ones).

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

Adding to 221012222001212 its reverse (212100222210122), we get a palindrome (433112444211334).

The spelling of 221012222001212 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-two million, one thousand, two hundred twelve".