21210101210111 has 8 divisors (see below), whose sum is σ = 23676392049024. Its totient is φ = 18833493674520.

The previous prime is 21210101210107. The next prime is 21210101210119. The reversal of 21210101210111 is 11101210101212.

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

It is a cyclic number.

It is not a de Polignac number, because 21210101210111 - 2² = 21210101210107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210101210119) 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, 22420825331 + ... + 22420826276.

It is an arithmetic number, because the mean of its divisors is an integer number (2959549006128).

Almost surely, 2^{21210101210111} is an apocalyptic number.

21210101210111 is a deficient number, since it is larger than the sum of its proper divisors (2466290838913).

21210101210111 is a wasteful number, since it uses less digits than its factorization.

21210101210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44841651661.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21210101210111 its reverse (11101210101212), we get a palindrome (32311311311323).

The spelling of 21210101210111 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred ten thousand, one hundred eleven".