21221022100022 has 16 divisors (see below), whose sum is σ = 32130610844112. Its totient is φ = 10510828280160.

The previous prime is 21221022100013. The next prime is 21221022100037. The reversal of 21221022100022 is 22000122012212.

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 7 ways as a sum of consecutive naturals, for example, 1912772 + ... + 6789752.

It is an arithmetic number, because the mean of its divisors is an integer number (2008163177757).

Almost surely, 2^{21221022100022} is an apocalyptic number.

21221022100022 is a deficient number, since it is larger than the sum of its proper divisors (10909588744090).

21221022100022 is a wasteful number, since it uses less digits than its factorization.

21221022100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4897423.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21221022100022 its reverse (22000122012212), we get a palindrome (43221144112234).

The spelling of 21221022100022 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-two million, one hundred thousand, twenty-two".