20110102212101 has 4 divisors (see below), whose sum is σ = 21938293322304. Its totient is φ = 18281911101900.

The previous prime is 20110102212059. The next prime is 20110102212103. The reversal of 20110102212101 is 10121220101102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20110102212101 - 2³⁴ = 20092922342917 is a prime.

It is a super-2 number, since 2×20110102212101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110102212103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914095555085 + ... + 914095555106.

It is an arithmetic number, because the mean of its divisors is an integer number (5484573330576).

Almost surely, 2^{20110102212101} is an apocalyptic number.

It is an amenable number.

20110102212101 is a deficient number, since it is larger than the sum of its proper divisors (1828191110203).

20110102212101 is a wasteful number, since it uses less digits than its factorization.

20110102212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828191110202.

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

Adding to 20110102212101 its reverse (10121220101102), we get a palindrome (30231322313203).

The spelling of 20110102212101 in words is "twenty trillion, one hundred ten billion, one hundred two million, two hundred twelve thousand, one hundred one".