21452121311 has 8 divisors (see below), whose sum is σ = 22442906304. Its totient is φ = 20483601280.

The previous prime is 21452121289. The next prime is 21452121373. The reversal of 21452121311 is 11312125412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21452121311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452121391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5564270 + ... + 5568123.

It is an arithmetic number, because the mean of its divisors is an integer number (2805363288).

Almost surely, 2^21452121311 is an apocalyptic number.

21452121311 is a deficient number, since it is larger than the sum of its proper divisors (990784993).

21452121311 is a wasteful number, since it uses less digits than its factorization.

21452121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11132481.

The product of its digits is 480, while the sum is 23.

Adding to 21452121311 its reverse (11312125412), we get a palindrome (32764246723).

The spelling of 21452121311 in words is "twenty-one billion, four hundred fifty-two million, one hundred twenty-one thousand, three hundred eleven".