21210233201212 has 24 divisors (see below), whose sum is σ = 40870695761280. Its totient is φ = 9550912144560.

The previous prime is 21210233201167. The next prime is 21210233201291.

21210233201212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2252568912 + ... + 2252578327.

It is an arithmetic number, because the mean of its divisors is an integer number (1702945656720).

Almost surely, 2^{21210233201212} is an apocalyptic number.

21210233201212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21210233201212 is a deficient number, since it is larger than the sum of its proper divisors (19660462560068).

21210233201212 is a wasteful number, since it uses less digits than its factorization.

21210233201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505147361 (or 4505147359 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 2121023 and 3201212, that added together give a palindrome (5322235).

The spelling of 21210233201212 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty-three million, two hundred one thousand, two hundred twelve".