21020101120211 has 16 divisors (see below), whose sum is σ = 22357569780000. Its totient is φ = 19693895374848.

The previous prime is 21020101120181. The next prime is 21020101120243. The reversal of 21020101120211 is 11202110102012.

It is a cyclic number.

It is not a de Polignac number, because 21020101120211 - 2³⁰ = 21019027378387 is a prime.

It is a super-2 number, since 2×21020101120211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020101120111) 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, 15588815 + ... + 16883463.

It is an arithmetic number, because the mean of its divisors is an integer number (1397348111250).

Almost surely, 2^{21020101120211} is an apocalyptic number.

21020101120211 is a deficient number, since it is larger than the sum of its proper divisors (1337468659789).

21020101120211 is a wasteful number, since it uses less digits than its factorization.

21020101120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298998.

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

Adding to 21020101120211 its reverse (11202110102012), we get a palindrome (32222211222223).

The spelling of 21020101120211 in words is "twenty-one trillion, twenty billion, one hundred one million, one hundred twenty thousand, two hundred eleven".