21010011222 has 16 divisors (see below), whose sum is σ = 42110784000. Its totient is φ = 6988210152.

The previous prime is 21010011203. The next prime is 21010011223. The reversal of 21010011222 is 22211001012.

It is a junction number, because it is equal to n+sod(n) for n = 21010011198 and 21010011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778722 + ... + 3784277.

It is an arithmetic number, because the mean of its divisors is an integer number (2631924000).

Almost surely, 2^21010011222 is an apocalyptic number.

21010011222 is an abundant number, since it is smaller than the sum of its proper divisors (21100772778).

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

21010011222 is a wasteful number, since it uses less digits than its factorization.

21010011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7563467.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21010011222 its reverse (22211001012), we get a palindrome (43221012234).

The spelling of 21010011222 in words is "twenty-one billion, ten million, eleven thousand, two hundred twenty-two".