213011230122 has 24 divisors (see below), whose sum is σ = 461676217860. Its totient is φ = 70980376320.

The previous prime is 213011230063. The next prime is 213011230183. The reversal of 213011230122 is 221032110312.

It can be written as a sum of positive squares in 2 ways, for example, as 143367492321 + 69643737801 = 378639^2 + 263901^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213011230095 and 213011230104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1890997 + ... + 2000472.

Almost surely, 2^213011230122 is an apocalyptic number.

213011230122 is an abundant number, since it is smaller than the sum of its proper divisors (248664987738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213011230122 is a wasteful number, since it uses less digits than its factorization.

213011230122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894518 (or 3894515 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 213011230122 its reverse (221032110312), we get a palindrome (434043340434).

The spelling of 213011230122 in words is "two hundred thirteen billion, eleven million, two hundred thirty thousand, one hundred twenty-two".