21212002202012 has 6 divisors (see below), whose sum is σ = 37121003853528. Its totient is φ = 10606001101004.

The previous prime is 21212002202003. The next prime is 21212002202033. The reversal of 21212002202012 is 21020220021212.

It is a happy number.

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, 2651500275248 + ... + 2651500275255.

It is an arithmetic number, because the mean of its divisors is an integer number (6186833975588).

Almost surely, 2^{21212002202012} is an apocalyptic number.

It is an amenable number.

21212002202012 is a deficient number, since it is larger than the sum of its proper divisors (15909001651516).

21212002202012 is a wasteful number, since it uses less digits than its factorization.

21212002202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303000550507 (or 5303000550505 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21212002202012 its reverse (21020220021212), we get a palindrome (42232222223224).

The spelling of 21212002202012 in words is "twenty-one trillion, two hundred twelve billion, two million, two hundred two thousand, twelve".