21222123010 has 32 divisors (see below), whose sum is σ = 41684108544. Its totient is φ = 7714992000.

The previous prime is 21222123001. The next prime is 21222123019. The reversal of 21222123010 is 1032122212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21222123001) and next prime (21222123019).

It is not an unprimeable number, because it can be changed into a prime (21222123019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402055 + ... + 451765.

It is an arithmetic number, because the mean of its divisors is an integer number (1302628392).

Almost surely, 2^21222123010 is an apocalyptic number.

21222123010 is a deficient number, since it is larger than the sum of its proper divisors (20461985534).

21222123010 is a wasteful number, since it uses less digits than its factorization.

21222123010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53610.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21222123010 its reverse (1032122212), we get a palindrome (22254245222).

The spelling of 21222123010 in words is "twenty-one billion, two hundred twenty-two million, one hundred twenty-three thousand, ten".