21212012011202 has 16 divisors (see below), whose sum is σ = 31854153906432. Its totient is φ = 10593967188960.

The previous prime is 21212012011187. The next prime is 21212012011207. The reversal of 21212012011202 is 20211021021212.

It is not an unprimeable number, because it can be changed into a prime (21212012011207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4936427 + ... + 8172657.

It is an arithmetic number, because the mean of its divisors is an integer number (1990884619152).

Almost surely, 2^{21212012011202} is an apocalyptic number.

21212012011202 is a deficient number, since it is larger than the sum of its proper divisors (10642141895230).

21212012011202 is a wasteful number, since it uses less digits than its factorization.

21212012011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239953.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212012011202 its reverse (20211021021212), we get a palindrome (41423033032414).

The spelling of 21212012011202 in words is "twenty-one trillion, two hundred twelve billion, twelve million, eleven thousand, two hundred two".