21611122150655 has 8 divisors (see below), whose sum is σ = 25933447560384. Its totient is φ = 17288830400800.

The previous prime is 21611122150649. The next prime is 21611122150661. The reversal of 21611122150655 is 55605122111612.

It is an interprime number because it is at equal distance from previous prime (21611122150649) and next prime (21611122150661).

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

It is not a de Polignac number, because 21611122150655 - 2¹⁴ = 21611122134271 is a prime.

It is a super-2 number, since 2×21611122150655² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 6980231 + ... + 9588840.

It is an arithmetic number, because the mean of its divisors is an integer number (3241680945048).

Almost surely, 2^{21611122150655} is an apocalyptic number.

21611122150655 is a deficient number, since it is larger than the sum of its proper divisors (4322325409729).

21611122150655 is a wasteful number, since it uses less digits than its factorization.

21611122150655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16829937.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 21611122150655 in words is "twenty-one trillion, six hundred eleven billion, one hundred twenty-two million, one hundred fifty thousand, six hundred fifty-five".