21452221401 has 8 divisors (see below), whose sum is σ = 30803189760. Its totient is φ = 13201366992.

The previous prime is 21452221391. The next prime is 21452221411. The reversal of 21452221401 is 10412225412.

It is an interprime number because it is at equal distance from previous prime (21452221391) and next prime (21452221411).

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

It is not a de Polignac number, because 21452221401 - 2²⁷ = 21318003673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21452221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275028441 + ... + 275028518.

It is an arithmetic number, because the mean of its divisors is an integer number (3850398720).

Almost surely, 2^21452221401 is an apocalyptic number.

It is an amenable number.

21452221401 is a deficient number, since it is larger than the sum of its proper divisors (9350968359).

21452221401 is a wasteful number, since it uses less digits than its factorization.

21452221401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550056975.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 21452221401 its reverse (10412225412), we get a palindrome (31864446813).

The spelling of 21452221401 in words is "twenty-one billion, four hundred fifty-two million, two hundred twenty-one thousand, four hundred one".