2121010523 has 2 divisors, whose sum is σ = 2121010524. Its totient is φ = 2121010522.

The previous prime is 2121010513. The next prime is 2121010537. The reversal of 2121010523 is 3250101212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121010523 - 2²⁰ = 2119961947 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2121010513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060505261 + 1060505262.

It is an arithmetic number, because the mean of its divisors is an integer number (1060505262).

Almost surely, 2^2121010523 is an apocalyptic number.

2121010523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121010523 is an equidigital number, since it uses as much as digits as its factorization.

2121010523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2121010523 is about 46054.4300040724. The cubic root of 2121010523 is about 1284.8357368999.

Adding to 2121010523 its reverse (3250101212), we get a palindrome (5371111735).

The spelling of 2121010523 in words is "two billion, one hundred twenty-one million, ten thousand, five hundred twenty-three".