21100120220001 has 48 divisors (see below), whose sum is σ = 30309957924480. Its totient is φ = 13051410032640.

The previous prime is 21100120219991. The next prime is 21100120220009. The reversal of 21100120220001 is 10002202100112.

It is not a de Polignac number, because 21100120220001 - 2¹⁰ = 21100120218977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100120220009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1077791725 + ... + 1077811301.

It is an arithmetic number, because the mean of its divisors is an integer number (631457456760).

Almost surely, 2^{21100120220001} is an apocalyptic number.

It is an amenable number.

21100120220001 is a deficient number, since it is larger than the sum of its proper divisors (9209837704479).

21100120220001 is a wasteful number, since it uses less digits than its factorization.

21100120220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37194 (or 37177 counting only the distinct ones).

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

Adding to 21100120220001 its reverse (10002202100112), we get a palindrome (31102322320113).

The spelling of 21100120220001 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, two hundred twenty thousand, one".