21221110200101 has 32 divisors (see below), whose sum is σ = 24971372568576. Its totient is φ = 17655121008000.

The previous prime is 21221110199987. The next prime is 21221110200113. The reversal of 21221110200101 is 10100201112212.

It is not a de Polignac number, because 21221110200101 - 2³⁸ = 20946232293157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221110205101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164105396 + ... + 164234658.

It is an arithmetic number, because the mean of its divisors is an integer number (780355392768).

Almost surely, 2^{21221110200101} is an apocalyptic number.

It is an amenable number.

21221110200101 is a deficient number, since it is larger than the sum of its proper divisors (3750262368475).

21221110200101 is a wasteful number, since it uses less digits than its factorization.

21221110200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132233.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21221110200101 its reverse (10100201112212), we get a palindrome (31321311312313).

The spelling of 21221110200101 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, two hundred thousand, one hundred one".