213333331012021 has 4 divisors (see below), whose sum is σ = 232727270194944. Its totient is φ = 193939391829100.

The previous prime is 213333331012013. The next prime is 213333331012027. The reversal of 213333331012021 is 120210133333312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213333331012021 - 2³ = 213333331012013 is a prime.

It is a super-2 number, since 2×213333331012021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213333331012027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9696969591445 + ... + 9696969591466.

It is an arithmetic number, because the mean of its divisors is an integer number (58181817548736).

Almost surely, 2^{213333331012021} is an apocalyptic number.

It is an amenable number.

213333331012021 is a deficient number, since it is larger than the sum of its proper divisors (19393939182923).

213333331012021 is a wasteful number, since it uses less digits than its factorization.

213333331012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19393939182922.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 213333331012021 its reverse (120210133333312), we get a palindrome (333543464345333).

The spelling of 213333331012021 in words is "two hundred thirteen trillion, three hundred thirty-three billion, three hundred thirty-one million, twelve thousand, twenty-one".