213020121043 has 2 divisors, whose sum is σ = 213020121044. Its totient is φ = 213020121042.

The previous prime is 213020121037. The next prime is 213020121121. The reversal of 213020121043 is 340121020312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213020121043 - 2⁵ = 213020121011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213020121043.

It is not a weakly prime, because it can be changed into another prime (213020121943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510060521 + 106510060522.

It is an arithmetic number, because the mean of its divisors is an integer number (106510060522).

Almost surely, 2^213020121043 is an apocalyptic number.

213020121043 is a deficient number, since it is larger than the sum of its proper divisors (1).

213020121043 is an equidigital number, since it uses as much as digits as its factorization.

213020121043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 213020121043 its reverse (340121020312), we get a palindrome (553141141355).

The spelling of 213020121043 in words is "two hundred thirteen billion, twenty million, one hundred twenty-one thousand, forty-three".