213401211123 has 32 divisors (see below), whose sum is σ = 303192668160. Its totient is φ = 133046484480.

The previous prime is 213401211083. The next prime is 213401211161. The reversal of 213401211123 is 321112104312.

It is not a de Polignac number, because 213401211123 - 2¹⁷ = 213401080051 is a prime.

It is a super-2 number, since 2×213401211123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213401211123.

It is not an unprimeable number, because it can be changed into a prime (213401211223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12598686 + ... + 12615612.

It is an arithmetic number, because the mean of its divisors is an integer number (9474770880).

Almost surely, 2^213401211123 is an apocalyptic number.

213401211123 is a deficient number, since it is larger than the sum of its proper divisors (89791457037).

213401211123 is a wasteful number, since it uses less digits than its factorization.

213401211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18507.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 213401211123 its reverse (321112104312), we get a palindrome (534513315435).

The spelling of 213401211123 in words is "two hundred thirteen billion, four hundred one million, two hundred eleven thousand, one hundred twenty-three".