21114001350555 has 16 divisors (see below), whose sum is σ = 33814916528640. Its totient is φ = 11249962597728.

The previous prime is 21114001350551. The next prime is 21114001350647. The reversal of 21114001350555 is 55505310041112.

It is a happy number.

It is not a de Polignac number, because 21114001350555 - 2² = 21114001350551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21114001350551) 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, 677366557 + ... + 677397726.

It is an arithmetic number, because the mean of its divisors is an integer number (2113432283040).

Almost surely, 2^{21114001350555} is an apocalyptic number.

21114001350555 is a deficient number, since it is larger than the sum of its proper divisors (12700915178085).

21114001350555 is a wasteful number, since it uses less digits than its factorization.

21114001350555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354765330.

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 21114001350555 its reverse (55505310041112), we get a palindrome (76619311391667).

The spelling of 21114001350555 in words is "twenty-one trillion, one hundred fourteen billion, one million, three hundred fifty thousand, five hundred fifty-five".