21155015110114 has 8 divisors (see below), whose sum is σ = 31732544680668. Its totient is φ = 10577500216560.

The previous prime is 21155015110057. The next prime is 21155015110121. The reversal of 21155015110114 is 41101151055112.

It can be written as a sum of positive squares in 2 ways, for example, as 19735068801889 + 1419946308225 = 4442417^2 + 1191615^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256904 + ... + 6624940.

Almost surely, 2^{21155015110114} is an apocalyptic number.

21155015110114 is a deficient number, since it is larger than the sum of its proper divisors (10577529570554).

21155015110114 is a wasteful number, since it uses less digits than its factorization.

21155015110114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338500.

The product of its (nonzero) digits is 1000, while the sum is 28.

Adding to 21155015110114 its reverse (41101151055112), we get a palindrome (62256166165226).

The spelling of 21155015110114 in words is "twenty-one trillion, one hundred fifty-five billion, fifteen million, one hundred ten thousand, one hundred fourteen".