210112121011 has 4 divisors (see below), whose sum is σ = 226274591872. Its totient is φ = 193949650152.

The previous prime is 210112120997. The next prime is 210112121033. The reversal of 210112121011 is 110121211012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 210112121011 - 2⁹ = 210112120499 is a prime.

It is a super-2 number, since 2×210112121011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16162470847 = 210112121011 / (2 + 1 + 0 + 1 + 1 + 2 + 1 + 2 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210112120982 and 210112121000.

It is not an unprimeable number, because it can be changed into a prime (210112121411) 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, 8081235411 + ... + 8081235436.

It is an arithmetic number, because the mean of its divisors is an integer number (56568647968).

Almost surely, 2^210112121011 is an apocalyptic number.

210112121011 is a deficient number, since it is larger than the sum of its proper divisors (16162470861).

210112121011 is a wasteful number, since it uses less digits than its factorization.

210112121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16162470860.

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

Adding to 210112121011 its reverse (110121211012), we get a palindrome (320233332023).

Subtracting from 210112121011 its reverse (110121211012), we obtain a palindrome (99990909999).

The spelling of 210112121011 in words is "two hundred ten billion, one hundred twelve million, one hundred twenty-one thousand, eleven".