213200121123 has 48 divisors (see below), whose sum is σ = 337787573760. Its totient is φ = 128507640000.

The previous prime is 213200121059. The next prime is 213200121143. The reversal of 213200121123 is 321121002312.

It is not a de Polignac number, because 213200121123 - 2⁶ = 213200121059 is a prime.

It is a super-2 number, since 2×213200121123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213200121096 and 213200121105.

It is not an unprimeable number, because it can be changed into a prime (213200121143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17860465 + ... + 17872397.

It is an arithmetic number, because the mean of its divisors is an integer number (7037241120).

Almost surely, 2^213200121123 is an apocalyptic number.

213200121123 is a deficient number, since it is larger than the sum of its proper divisors (124587452637).

213200121123 is a wasteful number, since it uses less digits than its factorization.

213200121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12920 (or 12917 counting only the distinct ones).

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

Adding to 213200121123 its reverse (321121002312), we get a palindrome (534321123435).

The spelling of 213200121123 in words is "two hundred thirteen billion, two hundred million, one hundred twenty-one thousand, one hundred twenty-three".