21012222002160 has 80 divisors (see below), whose sum is σ = 65286266411520. Its totient is φ = 5590495484160.

The previous prime is 21012222002159. The next prime is 21012222002207. The reversal of 21012222002160 is 6120022221012.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99610956 + ... + 99821675.

It is an arithmetic number, because the mean of its divisors is an integer number (816078330144).

Almost surely, 2^{21012222002160} is an apocalyptic number.

21012222002160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012222002160 is an abundant number, since it is smaller than the sum of its proper divisors (44274044409360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012222002160 is a wasteful number, since it uses less digits than its factorization.

21012222002160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199433086 (or 199433080 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21012222002160 its reverse (6120022221012), we get a palindrome (27132244223172).

The spelling of 21012222002160 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, two thousand, one hundred sixty".