21021201110110 has 8 divisors (see below), whose sum is σ = 37838161998216. Its totient is φ = 8408480444040.

The previous prime is 21021201110081. The next prime is 21021201110123. The reversal of 21021201110110 is 1101110212012.

It is a happy number.

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

It is a super-2 number, since 2×21021201110110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051060055496 + ... + 1051060055515.

It is an arithmetic number, because the mean of its divisors is an integer number (4729770249777).

Almost surely, 2^{21021201110110} is an apocalyptic number.

21021201110110 is a deficient number, since it is larger than the sum of its proper divisors (16816960888106).

21021201110110 is a wasteful number, since it uses less digits than its factorization.

21021201110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102120111018.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21021201110110 its reverse (1101110212012), we get a palindrome (22122311322122).

The spelling of 21021201110110 in words is "twenty-one trillion, twenty-one billion, two hundred one million, one hundred ten thousand, one hundred ten".