21022012012012 has 24 divisors (see below), whose sum is σ = 40136588372160. Its totient is φ = 9554589446160.

The previous prime is 21022012011953. The next prime is 21022012012063. The reversal of 21022012012012 is 21021021022012.

It is a happy 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, 21275418 + ... + 22241569.

It is an arithmetic number, because the mean of its divisors is an integer number (1672357848840).

Almost surely, 2^{21022012012012} is an apocalyptic number.

21022012012012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21022012012012 is a deficient number, since it is larger than the sum of its proper divisors (19114576360148).

21022012012012 is a wasteful number, since it uses less digits than its factorization.

21022012012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43527981 (or 43527979 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022012012012 its reverse (21021021022012), we get a palindrome (42043033034024).

The spelling of 21022012012012 in words is "twenty-one trillion, twenty-two billion, twelve million, twelve thousand, twelve".