21031424102 has 32 divisors (see below), whose sum is σ = 35774978400. Its totient is φ = 9192572928.

The previous prime is 21031424069. The next prime is 21031424107. The reversal of 21031424102 is 20142413012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031424107) 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, 1751174 + ... + 1763142.

It is an arithmetic number, because the mean of its divisors is an integer number (1117968075).

Almost surely, 2^21031424102 is an apocalyptic number.

21031424102 is a deficient number, since it is larger than the sum of its proper divisors (14743554298).

21031424102 is a wasteful number, since it uses less digits than its factorization.

21031424102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15560.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21031424102 its reverse (20142413012), we get a palindrome (41173837114).

The spelling of 21031424102 in words is "twenty-one billion, thirty-one million, four hundred twenty-four thousand, one hundred two".