213122121103 has 16 divisors (see below), whose sum is σ = 229576114080. Its totient is φ = 197123245056.

The previous prime is 213122121097. The next prime is 213122121139. The reversal of 213122121103 is 301121221312.

It is a cyclic number.

It is not a de Polignac number, because 213122121103 - 2¹³ = 213122112911 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 (213122121143) 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, 33768 + ... + 653746.

It is an arithmetic number, because the mean of its divisors is an integer number (14348507130).

Almost surely, 2^213122121103 is an apocalyptic number.

213122121103 is a deficient number, since it is larger than the sum of its proper divisors (16453992977).

213122121103 is a wasteful number, since it uses less digits than its factorization.

213122121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620346.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 213122121103 its reverse (301121221312), we get a palindrome (514243342415).

The spelling of 213122121103 in words is "two hundred thirteen billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred three".