2121053541493 has 2 divisors, whose sum is σ = 2121053541494. Its totient is φ = 2121053541492.

The previous prime is 2121053541491. The next prime is 2121053541517. The reversal of 2121053541493 is 3941453501212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1696813653924 + 424239887569 = 1302618^2 + 651337^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121053541493 - 2¹ = 2121053541491 is a prime.

Together with 2121053541491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121053541491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060526770746 + 1060526770747.

It is an arithmetic number, because the mean of its divisors is an integer number (1060526770747).

Almost surely, 2^{2121053541493} is an apocalyptic number.

It is an amenable number.

2121053541493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121053541493 is an equidigital number, since it uses as much as digits as its factorization.

2121053541493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 2121053541493 in words is "two trillion, one hundred twenty-one billion, fifty-three million, five hundred forty-one thousand, four hundred ninety-three".