21030113012 has 12 divisors (see below), whose sum is σ = 36805784736. Its totient is φ = 10514174520.

The previous prime is 21030113009. The next prime is 21030113017. The reversal of 21030113012 is 21031103012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030113017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165314 + ... + 263417.

It is an arithmetic number, because the mean of its divisors is an integer number (3067148728).

Almost surely, 2^21030113012 is an apocalyptic number.

It is an amenable number.

21030113012 is a deficient number, since it is larger than the sum of its proper divisors (15775671724).

21030113012 is a wasteful number, since it uses less digits than its factorization.

21030113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440998 (or 440996 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21030113012 its reverse (21031103012), we get a palindrome (42061216024).

The spelling of 21030113012 in words is "twenty-one billion, thirty million, one hundred thirteen thousand, twelve".