21255413350611 has 32 divisors (see below), whose sum is σ = 31929625552896. Its totient is φ = 12460526208000.

The previous prime is 21255413350607. The next prime is 21255413350643. The reversal of 21255413350611 is 11605331455212.

It is not a de Polignac number, because 21255413350611 - 2² = 21255413350607 is a prime.

It is a super-3 number, since 3×21255413350611³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 21255413350611.

It is not an unprimeable number, because it can be changed into a prime (21255413310611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2863336 + ... + 7121061.

It is an arithmetic number, because the mean of its divisors is an integer number (997800798528).

Almost surely, 2^{21255413350611} is an apocalyptic number.

21255413350611 is a deficient number, since it is larger than the sum of its proper divisors (10674212202285).

21255413350611 is a wasteful number, since it uses less digits than its factorization.

21255413350611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9986523.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 21255413350611 in words is "twenty-one trillion, two hundred fifty-five billion, four hundred thirteen million, three hundred fifty thousand, six hundred eleven".