211222100212 has 24 divisors (see below), whose sum is σ = 372262212000. Its totient is φ = 104862012576.

The previous prime is 211222100203. The next prime is 211222100239. The reversal of 211222100212 is 212001222112.

It is a happy number.

It is a super-2 number, since 2×211222100212² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 1518123 + ... + 1651405.

It is an arithmetic number, because the mean of its divisors is an integer number (15510925500).

Almost surely, 2^211222100212 is an apocalyptic number.

It is an amenable number.

211222100212 is a deficient number, since it is larger than the sum of its proper divisors (161040111788).

211222100212 is a wasteful number, since it uses less digits than its factorization.

211222100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136095 (or 136093 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211222100212 its reverse (212001222112), we get a palindrome (423223322324).

The spelling of 211222100212 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred thousand, two hundred twelve".