21141511534455 has 16 divisors (see below), whose sum is σ = 36428450644320. Its totient is φ = 10408128755328.

The previous prime is 21141511534447. The next prime is 21141511534459. The reversal of 21141511534455 is 55443511514112.

It is not a de Polignac number, because 21141511534455 - 2³ = 21141511534447 is a prime.

It is a super-2 number, since 2×21141511534455² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141511534459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54209003740 + ... + 54209004129.

It is an arithmetic number, because the mean of its divisors is an integer number (2276778165270).

Almost surely, 2^{21141511534455} is an apocalyptic number.

21141511534455 is a deficient number, since it is larger than the sum of its proper divisors (15286939109865).

21141511534455 is a wasteful number, since it uses less digits than its factorization.

21141511534455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108418007890.

The product of its digits is 240000, while the sum is 42.

The spelling of 21141511534455 in words is "twenty-one trillion, one hundred forty-one billion, five hundred eleven million, five hundred thirty-four thousand, four hundred fifty-five".