21153011514603 has 8 divisors (see below), whose sum is σ = 28204920003216. Its totient is φ = 14101555351200.

The previous prime is 21153011514527. The next prime is 21153011514641. The reversal of 21153011514603 is 30641511035112.

It is a happy number.

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

It is not a de Polignac number, because 21153011514603 - 2¹⁴ = 21153011498219 is a prime.

It is a super-2 number, since 2×21153011514603² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21153011513603) 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, 112972168 + ... + 113159253.

It is an arithmetic number, because the mean of its divisors is an integer number (3525615000402).

Almost surely, 2^{21153011514603} is an apocalyptic number.

21153011514603 is a deficient number, since it is larger than the sum of its proper divisors (7051908488613).

21153011514603 is a wasteful number, since it uses less digits than its factorization.

21153011514603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226162605.

The product of its (nonzero) digits is 10800, while the sum is 33.

Adding to 21153011514603 its reverse (30641511035112), we get a palindrome (51794522549715).

The spelling of 21153011514603 in words is "twenty-one trillion, one hundred fifty-three billion, eleven million, five hundred fourteen thousand, six hundred three".