211212012011 has 48 divisors (see below), whose sum is σ = 297541486080. Its totient is φ = 145315272960.

The previous prime is 211212011987. The next prime is 211212012073. The reversal of 211212012011 is 110210212112.

It is not a de Polignac number, because 211212012011 - 2²² = 211207817707 is a prime.

It is a super-2 number, since 2×211212012011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212012611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53546 + ... + 652143.

It is an arithmetic number, because the mean of its divisors is an integer number (6198780960).

Almost surely, 2^211212012011 is an apocalyptic number.

211212012011 is a deficient number, since it is larger than the sum of its proper divisors (86329474069).

211212012011 is a wasteful number, since it uses less digits than its factorization.

211212012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705756 (or 705743 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211212012011 its reverse (110210212112), we get a palindrome (321422224123).

The spelling of 211212012011 in words is "two hundred eleven billion, two hundred twelve million, twelve thousand, eleven".