211211100001012 has 6 divisors (see below), whose sum is σ = 369619425001778. Its totient is φ = 105605550000504.

The previous prime is 211211100000961. The next prime is 211211100001021. The reversal of 211211100001012 is 210100001112112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 210196817363556 + 1014282637456 = 14498166^2 + 1007116^2 .

It is a super-2 number, since 2×211211100001012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211100000983 and 211211100001001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26401387500123 + ... + 26401387500130.

Almost surely, 2^{211211100001012} is an apocalyptic number.

It is an amenable number.

211211100001012 is a deficient number, since it is larger than the sum of its proper divisors (158408325000766).

211211100001012 is a wasteful number, since it uses less digits than its factorization.

211211100001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52802775000257 (or 52802775000255 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211211100001012 its reverse (210100001112112), we get a palindrome (421311101113124).

The spelling of 211211100001012 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred million, one thousand, twelve".