2123212553 has 16 divisors (see below), whose sum is σ = 2651541504. Its totient is φ = 1651689360.

The previous prime is 2123212541. The next prime is 2123212561. The reversal of 2123212553 is 3552123212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2123212553 - 2¹⁰ = 2123211529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123212253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24026 + ... + 69452.

It is an arithmetic number, because the mean of its divisors is an integer number (165721344).

Almost surely, 2^2123212553 is an apocalyptic number.

It is an amenable number.

2123212553 is a deficient number, since it is larger than the sum of its proper divisors (528328951).

2123212553 is a wasteful number, since it uses less digits than its factorization.

2123212553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46052.

The product of its digits is 3600, while the sum is 26.

The square root of 2123212553 is about 46078.3306229729. The cubic root of 2123212553 is about 1285.2802213040.

Adding to 2123212553 its reverse (3552123212), we get a palindrome (5675335765).

The spelling of 2123212553 in words is "two billion, one hundred twenty-three million, two hundred twelve thousand, five hundred fifty-three".