213120121033 has 4 divisors (see below), whose sum is σ = 213628761360. Its totient is φ = 212611480708.

The previous prime is 213120121031. The next prime is 213120121051. The reversal of 213120121033 is 330121021312.

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 213120121033 - 2¹ = 213120121031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213120121033.

It is not an unprimeable number, because it can be changed into a prime (213120121031) 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, 254319535 + ... + 254320372.

It is an arithmetic number, because the mean of its divisors is an integer number (53407190340).

Almost surely, 2^213120121033 is an apocalyptic number.

It is an amenable number.

213120121033 is a deficient number, since it is larger than the sum of its proper divisors (508640327).

213120121033 is an equidigital number, since it uses as much as digits as its factorization.

213120121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508640326.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 213120121033 its reverse (330121021312), we get a palindrome (543241142345).

It can be divided in two parts, 213120 and 121033, that added together give a triangular number (334153 = T₈₁₇).

The spelling of 213120121033 in words is "two hundred thirteen billion, one hundred twenty million, one hundred twenty-one thousand, thirty-three".