21210101202101 has 32 divisors (see below), whose sum is σ = 25278187124736. Its totient is φ = 17413655040000.

The previous prime is 21210101202089. The next prime is 21210101202193. The reversal of 21210101202101 is 10120210101212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210101202101 is a prime.

It is a super-3 number, since 3×21210101202101³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210101262101) 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, 66490481 + ... + 66808713.

It is an arithmetic number, because the mean of its divisors is an integer number (789943347648).

Almost surely, 2^{21210101202101} is an apocalyptic number.

It is an amenable number.

21210101202101 is a deficient number, since it is larger than the sum of its proper divisors (4068085922635).

21210101202101 is a wasteful number, since it uses less digits than its factorization.

21210101202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321413.

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

Adding to 21210101202101 its reverse (10120210101212), we get a palindrome (31330311303313).

The spelling of 21210101202101 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred two thousand, one hundred one".