21125410311 has 8 divisors (see below), whose sum is σ = 28191068784. Its totient is φ = 14071679360.

The previous prime is 21125410309. The next prime is 21125410331. The reversal of 21125410311 is 11301452112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21125410311 - 2¹ = 21125410309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21125410331) 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 7 ways as a sum of consecutive naturals, for example, 2977746 + ... + 2984831.

It is an arithmetic number, because the mean of its divisors is an integer number (3523883598).

Almost surely, 2^21125410311 is an apocalyptic number.

21125410311 is a deficient number, since it is larger than the sum of its proper divisors (7065658473).

21125410311 is a wasteful number, since it uses less digits than its factorization.

21125410311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5963761.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 21125410311 its reverse (11301452112), we get a palindrome (32426862423).

The spelling of 21125410311 in words is "twenty-one billion, one hundred twenty-five million, four hundred ten thousand, three hundred eleven".