21120001202111 has 8 divisors (see below), whose sum is σ = 24137694540960. Its totient is φ = 18102445440768.

The previous prime is 21120001202029. The next prime is 21120001202117. The reversal of 21120001202111 is 11120210002112.

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 21120001202111 - 2¹⁰ = 21120001201087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120001202117) 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, 34065206 + ... + 34679651.

It is an arithmetic number, because the mean of its divisors is an integer number (3017211817620).

Almost surely, 2^{21120001202111} is an apocalyptic number.

21120001202111 is a deficient number, since it is larger than the sum of its proper divisors (3017693338849).

21120001202111 is an equidigital number, since it uses as much as digits as its factorization.

21120001202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68788753.

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

Adding to 21120001202111 its reverse (11120210002112), we get a palindrome (32240211204223).

The spelling of 21120001202111 in words is "twenty-one trillion, one hundred twenty billion, one million, two hundred two thousand, one hundred eleven".