213233331021 has 8 divisors (see below), whose sum is σ = 284313440544. Its totient is φ = 142154387760.

The previous prime is 213233331013. The next prime is 213233331049. The reversal of 213233331021 is 120133332312.

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

It is not a de Polignac number, because 213233331021 - 2³ = 213233331013 is a prime.

It is a super-2 number, since 2×213233331021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213233330982 and 213233331000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213233331121) 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, 315795 + ... + 725391.

It is an arithmetic number, because the mean of its divisors is an integer number (35539180068).

Almost surely, 2^213233331021 is an apocalyptic number.

It is an amenable number.

213233331021 is a deficient number, since it is larger than the sum of its proper divisors (71080109523).

213233331021 is a wasteful number, since it uses less digits than its factorization.

213233331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583131.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 213233331021 its reverse (120133332312), we get a palindrome (333366663333).

The spelling of 213233331021 in words is "two hundred thirteen billion, two hundred thirty-three million, three hundred thirty-one thousand, twenty-one".