211212210012 has 12 divisors (see below), whose sum is σ = 492828490056. Its totient is φ = 70404070000.

The previous prime is 211212209963. The next prime is 211212210049. The reversal of 211212210012 is 210012212112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211212210012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211212209973 and 211212210000.

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, 8800508739 + ... + 8800508762.

It is an arithmetic number, because the mean of its divisors is an integer number (41069040838).

Almost surely, 2^211212210012 is an apocalyptic number.

It is an amenable number.

211212210012 is an abundant number, since it is smaller than the sum of its proper divisors (281616280044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211212210012 is a wasteful number, since it uses less digits than its factorization.

211212210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17601017508 (or 17601017506 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211212210012 its reverse (210012212112), we get a palindrome (421224422124).

The spelling of 211212210012 in words is "two hundred eleven billion, two hundred twelve million, two hundred ten thousand, twelve".