213123132031 has 8 divisors (see below), whose sum is σ = 224414508800. Its totient is φ = 201839192280.

The previous prime is 213123132029. The next prime is 213123132049. The reversal of 213123132031 is 130231321312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213123132031 - 2¹ = 213123132029 is a prime.

It is a super-2 number, since 2×213123132031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213123131993 and 213123132011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123132091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800375 + ... + 1915096.

It is an arithmetic number, because the mean of its divisors is an integer number (28051813600).

Almost surely, 2^213123132031 is an apocalyptic number.

213123132031 is a deficient number, since it is larger than the sum of its proper divisors (11291376769).

213123132031 is a wasteful number, since it uses less digits than its factorization.

213123132031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718509.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213123132031 its reverse (130231321312), we get a palindrome (343354453343).

The spelling of 213123132031 in words is "two hundred thirteen billion, one hundred twenty-three million, one hundred thirty-two thousand, thirty-one".