213120221331 has 8 divisors (see below), whose sum is σ = 290768674240. Its totient is φ = 138775957992.

The previous prime is 213120221329. The next prime is 213120221407. The reversal of 213120221331 is 133122021312.

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

It is not a de Polignac number, because 213120221331 - 2¹ = 213120221329 is a prime.

It is a super-2 number, since 2×213120221331² (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 = 213120221298 and 213120221307.

It is not an unprimeable number, because it can be changed into a prime (213120229331) 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, 826047241 + ... + 826047498.

It is an arithmetic number, because the mean of its divisors is an integer number (36346084280).

Almost surely, 2^213120221331 is an apocalyptic number.

213120221331 is a deficient number, since it is larger than the sum of its proper divisors (77648452909).

213120221331 is a wasteful number, since it uses less digits than its factorization.

213120221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652094785.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213120221331 its reverse (133122021312), we get a palindrome (346242242643).

The spelling of 213120221331 in words is "two hundred thirteen billion, one hundred twenty million, two hundred twenty-one thousand, three hundred thirty-one".