21110425005 has 16 divisors (see below), whose sum is σ = 33780193920. Its totient is φ = 11257722048.

The previous prime is 21110425003. The next prime is 21110425051. The reversal of 21110425005 is 50052401112.

It is not a de Polignac number, because 21110425005 - 2¹ = 21110425003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110425003) 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, 87111 + ... + 223179.

It is an arithmetic number, because the mean of its divisors is an integer number (2111262120).

Almost surely, 2^21110425005 is an apocalyptic number.

It is an amenable number.

21110425005 is a deficient number, since it is larger than the sum of its proper divisors (12669768915).

21110425005 is a wasteful number, since it uses less digits than its factorization.

21110425005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146420.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 21110425005 its reverse (50052401112), we get a palindrome (71162826117).

The spelling of 21110425005 in words is "twenty-one billion, one hundred ten million, four hundred twenty-five thousand, five".