210111012212021 has 4 divisors (see below), whose sum is σ = 210297115855500. Its totient is φ = 209924908568544.

The previous prime is 210111012211829. The next prime is 210111012212033. The reversal of 210111012212021 is 120212210111012.

210111012212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5295700935121 + 204815311276900 = 2301239^2 + 14311370^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111012212021 - 2³⁴ = 210093832342837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111017212021) 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, 93051820046 + ... + 93051822303.

It is an arithmetic number, because the mean of its divisors is an integer number (52574278963875).

Almost surely, 2^{210111012212021} is an apocalyptic number.

It is an amenable number.

210111012212021 is a deficient number, since it is larger than the sum of its proper divisors (186103643479).

210111012212021 is a wasteful number, since it uses less digits than its factorization.

210111012212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186103643478.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210111012212021 its reverse (120212210111012), we get a palindrome (330323222323033).

The spelling of 210111012212021 in words is "two hundred ten trillion, one hundred eleven billion, twelve million, two hundred twelve thousand, twenty-one".