21222001210102 has 64 divisors (see below), whose sum is σ = 40399557977088. Its totient is φ = 8120459952000.

The previous prime is 21222001210079. The next prime is 21222001210139. The reversal of 21222001210102 is 20101210022212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4500583 + ... + 7918285.

It is an arithmetic number, because the mean of its divisors is an integer number (631243093392).

Almost surely, 2^{21222001210102} is an apocalyptic number.

21222001210102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222001210102 is a deficient number, since it is larger than the sum of its proper divisors (19177556766986).

21222001210102 is a wasteful number, since it uses less digits than its factorization.

21222001210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418445.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222001210102 its reverse (20101210022212), we get a palindrome (41323211232314).

The spelling of 21222001210102 in words is "twenty-one trillion, two hundred twenty-two billion, one million, two hundred ten thousand, one hundred two".