21010120222 has 48 divisors (see below), whose sum is σ = 39077907840. Its totient is φ = 8295314976.

The previous prime is 21010120211. The next prime is 21010120223. The reversal of 21010120222 is 22202101012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010120223) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1228929 + ... + 1245907.

It is an arithmetic number, because the mean of its divisors is an integer number (814123080).

Almost surely, 2^21010120222 is an apocalyptic number.

21010120222 is a deficient number, since it is larger than the sum of its proper divisors (18067787618).

21010120222 is a wasteful number, since it uses less digits than its factorization.

21010120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17537 (or 17524 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21010120222 its reverse (22202101012), we get a palindrome (43212221234).

The spelling of 21010120222 in words is "twenty-one billion, ten million, one hundred twenty thousand, two hundred twenty-two".