21211010220001 has 16 divisors (see below), whose sum is σ = 24247072942848. Its totient is φ = 18176427691200.

The previous prime is 21211010219969. The next prime is 21211010220011. The reversal of 21211010220001 is 10002201011212.

It is a cyclic number.

It is not a de Polignac number, because 21211010220001 - 2⁵ = 21211010219969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211010220011) 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, 947289516 + ... + 947311906.

It is an arithmetic number, because the mean of its divisors is an integer number (1515442058928).

Almost surely, 2^{21211010220001} is an apocalyptic number.

It is an amenable number.

21211010220001 is a deficient number, since it is larger than the sum of its proper divisors (3036062722847).

21211010220001 is a wasteful number, since it uses less digits than its factorization.

21211010220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49392.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21211010220001 its reverse (10002201011212), we get a palindrome (31213211231213).

The spelling of 21211010220001 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred twenty thousand, one".