21105055033334 has 16 divisors (see below), whose sum is σ = 31771369848816. Its totient is φ = 10514601081600.

The previous prime is 21105055033103. The next prime is 21105055033351. The reversal of 21105055033334 is 43333055050112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21105055033294 and 21105055033303.

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, 15543569 + ... + 16846739.

It is an arithmetic number, because the mean of its divisors is an integer number (1985710615551).

Almost surely, 2^{21105055033334} is an apocalyptic number.

21105055033334 is a deficient number, since it is larger than the sum of its proper divisors (10666314815482).

21105055033334 is a wasteful number, since it uses less digits than its factorization.

21105055033334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332271.

The product of its (nonzero) digits is 81000, while the sum is 35.

The spelling of 21105055033334 in words is "twenty-one trillion, one hundred five billion, fifty-five million, thirty-three thousand, three hundred thirty-four".