21471604110155 has 8 divisors (see below), whose sum is σ = 25778636303472. Its totient is φ = 17168809040608.

The previous prime is 21471604110053. The next prime is 21471604110227. The reversal of 21471604110155 is 55101140617412.

It is a happy number.

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 21471604110155 - 2⁴² = 17073557599051 is a prime.

It is a super-2 number, since 2×21471604110155² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059269792 + ... + 1059290061.

It is an arithmetic number, because the mean of its divisors is an integer number (3222329537934).

Almost surely, 2^{21471604110155} is an apocalyptic number.

21471604110155 is a deficient number, since it is larger than the sum of its proper divisors (4307032193317).

21471604110155 is a wasteful number, since it uses less digits than its factorization.

21471604110155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118561885.

The product of its (nonzero) digits is 33600, while the sum is 38.

Adding to 21471604110155 its reverse (55101140617412), we get a palindrome (76572744727567).

The spelling of 21471604110155 in words is "twenty-one trillion, four hundred seventy-one billion, six hundred four million, one hundred ten thousand, one hundred fifty-five".