21110415051 has 16 divisors (see below), whose sum is σ = 30788398080. Its totient is φ = 12759882720.

The previous prime is 21110415047. The next prime is 21110415103. The reversal of 21110415051 is 15051401112.

It is not a de Polignac number, because 21110415051 - 2² = 21110415047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110414051) 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, 845211 + ... + 869828.

It is an arithmetic number, because the mean of its divisors is an integer number (1924274880).

Almost surely, 2^21110415051 is an apocalyptic number.

21110415051 is a deficient number, since it is larger than the sum of its proper divisors (9677983029).

21110415051 is a wasteful number, since it uses less digits than its factorization.

21110415051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715426.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 21110415051 its reverse (15051401112), we get a palindrome (36161816163).

The spelling of 21110415051 in words is "twenty-one billion, one hundred ten million, four hundred fifteen thousand, fifty-one".