210121113323 has 16 divisors (see below), whose sum is σ = 234964098432. Its totient is φ = 186240936000.

The previous prime is 210121113311. The next prime is 210121113337. The reversal of 210121113323 is 323311121012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210121113323 - 2¹² = 210121109227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210121113295 and 210121113304.

It is not an unprimeable number, because it can be changed into a prime (210121113383) 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, 560240 + ... + 856802.

It is an arithmetic number, because the mean of its divisors is an integer number (14685256152).

Almost surely, 2^210121113323 is an apocalyptic number.

210121113323 is a deficient number, since it is larger than the sum of its proper divisors (24842985109).

210121113323 is a wasteful number, since it uses less digits than its factorization.

210121113323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298186.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 210121113323 its reverse (323311121012), we get a palindrome (533432234335).

The spelling of 210121113323 in words is "two hundred ten billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred twenty-three".