21212011010012 has 6 divisors (see below), whose sum is σ = 37121019267528. Its totient is φ = 10606005505004.

The previous prime is 21212011009991. The next prime is 21212011010017. The reversal of 21212011010012 is 21001011021212.

It is a super-2 number, since 2×21212011010012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212011010017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651501376248 + ... + 2651501376255.

It is an arithmetic number, because the mean of its divisors is an integer number (6186836544588).

Almost surely, 2^{21212011010012} is an apocalyptic number.

It is an amenable number.

21212011010012 is a deficient number, since it is larger than the sum of its proper divisors (15909008257516).

21212011010012 is a wasteful number, since it uses less digits than its factorization.

21212011010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303002752507 (or 5303002752505 counting only the distinct ones).

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

Adding to 21212011010012 its reverse (21001011021212), we get a palindrome (42213022031224).

The spelling of 21212011010012 in words is "twenty-one trillion, two hundred twelve billion, eleven million, ten thousand, twelve".