21120201211101 has 16 divisors (see below), whose sum is σ = 28340010648000. Its totient is φ = 13990265347968.

The previous prime is 21120201211099. The next prime is 21120201211133. The reversal of 21120201211101 is 10111210202112.

It is a happy number.

It is not a de Polignac number, because 21120201211101 - 2¹ = 21120201211099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120201211141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41202225 + ... + 41711673.

It is an arithmetic number, because the mean of its divisors is an integer number (1771250665500).

Almost surely, 2^{21120201211101} is an apocalyptic number.

It is an amenable number.

21120201211101 is a deficient number, since it is larger than the sum of its proper divisors (7219809436899).

21120201211101 is a wasteful number, since it uses less digits than its factorization.

21120201211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597628.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21120201211101 its reverse (10111210202112), we get a palindrome (31231411413213).

The spelling of 21120201211101 in words is "twenty-one trillion, one hundred twenty billion, two hundred one million, two hundred eleven thousand, one hundred one".