21021222212012 has 24 divisors (see below), whose sum is σ = 40150877340672. Its totient is φ = 9550469310800.

The previous prime is 21021222212009. The next prime is 21021222212027.

21021222212012 is nontrivially palindromic in base 10.

It is an unprimeable number.

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, 115700564 + ... + 115882107.

It is an arithmetic number, because the mean of its divisors is an integer number (1672953222528).

Almost surely, 2^{21021222212012} is an apocalyptic number.

21021222212012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021222212012 is a deficient number, since it is larger than the sum of its proper divisors (19129655128660).

21021222212012 is a wasteful number, since it uses less digits than its factorization.

21021222212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231584749 (or 231584747 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 2102122 and 2212012, that added together give a palindrome (4314134).

The spelling of 21021222212012 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, twelve".