21212022070 has 16 divisors (see below), whose sum is σ = 38186650368. Its totient is φ = 8483695360.

The previous prime is 21212022019. The next prime is 21212022071. The reversal of 21212022070 is 7022021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212022071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56854 + ... + 213673.

It is an arithmetic number, because the mean of its divisors is an integer number (2386665648).

Almost surely, 2^21212022070 is an apocalyptic number.

21212022070 is a deficient number, since it is larger than the sum of its proper divisors (16974628298).

21212022070 is a wasteful number, since it uses less digits than its factorization.

21212022070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278375.

The product of its (nonzero) digits is 224, while the sum is 19.

Adding to 21212022070 its reverse (7022021212), we get a palindrome (28234043282).

The spelling of 21212022070 in words is "twenty-one billion, two hundred twelve million, twenty-two thousand, seventy".