21211022210101 has 16 divisors (see below), whose sum is σ = 22169313653760. Its totient is φ = 20268104371200.

The previous prime is 21211022210099. The next prime is 21211022210113. The reversal of 21211022210101 is 10101222011212.

It is a cyclic number.

It is not a de Polignac number, because 21211022210101 - 2¹ = 21211022210099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211022240101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2564476 + ... + 6999898.

It is an arithmetic number, because the mean of its divisors is an integer number (1385582103360).

Almost surely, 2^{21211022210101} is an apocalyptic number.

It is an amenable number.

21211022210101 is a deficient number, since it is larger than the sum of its proper divisors (958291443659).

21211022210101 is a wasteful number, since it uses less digits than its factorization.

21211022210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437156.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211022210101 its reverse (10101222011212), we get a palindrome (31312244221313).

The spelling of 21211022210101 in words is "twenty-one trillion, two hundred eleven billion, twenty-two million, two hundred ten thousand, one hundred one".