213120002021 has 8 divisors (see below), whose sum is σ = 215041720320. Its totient is φ = 211198910272.

The previous prime is 213120002003. The next prime is 213120002243. The reversal of 213120002021 is 120200021312.

It is a happy number.

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 213120002021 - 2¹⁰ = 213120000997 is a prime.

It is a super-2 number, since 2×213120002021² (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 = 213120001987 and 213120002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213120007021) 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, 540650 + ... + 847668.

It is an arithmetic number, because the mean of its divisors is an integer number (26880215040).

Almost surely, 2^213120002021 is an apocalyptic number.

It is an amenable number.

213120002021 is a deficient number, since it is larger than the sum of its proper divisors (1921718299).

213120002021 is a wasteful number, since it uses less digits than its factorization.

213120002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313275.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 213120002021 its reverse (120200021312), we get a palindrome (333320023333).

The spelling of 213120002021 in words is "two hundred thirteen billion, one hundred twenty million, two thousand, twenty-one".