211211212001212 has 24 divisors (see below), whose sum is σ = 375903486871920. Its totient is φ = 103810397909760.

The previous prime is 211211212001203. The next prime is 211211212001221. The reversal of 211211212001212 is 212100212112112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211211212001203) and next prime (211211212001221).

It is a super-2 number, since 2×211211212001212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211211212001212.

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, 18119853 + ... + 27399844.

It is an arithmetic number, because the mean of its divisors is an integer number (15662645286330).

Almost surely, 2^{211211212001212} is an apocalyptic number.

It is an amenable number.

211211212001212 is a deficient number, since it is larger than the sum of its proper divisors (164692274870708).

211211212001212 is a wasteful number, since it uses less digits than its factorization.

211211212001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45539421 (or 45539419 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211211212001212 its reverse (212100212112112), we get a palindrome (423311424113324).

The spelling of 211211212001212 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twelve million, one thousand, two hundred twelve".