21211200210101 has 8 divisors (see below), whose sum is σ = 23142821124000. Its totient is φ = 19280134293840.

The previous prime is 21211200210091. The next prime is 21211200210197. The reversal of 21211200210101 is 10101200211212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211200210101 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 (21211200210401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138669491 + ... + 138822368.

It is an arithmetic number, because the mean of its divisors is an integer number (2892852640500).

Almost surely, 2^{21211200210101} is an apocalyptic number.

It is an amenable number.

21211200210101 is a deficient number, since it is larger than the sum of its proper divisors (1931620913899).

21211200210101 is a wasteful number, since it uses less digits than its factorization.

21211200210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277498819.

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

Adding to 21211200210101 its reverse (10101200211212), we get a palindrome (31312400421313).

The spelling of 21211200210101 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, two hundred ten thousand, one hundred one".