21031013134 has 4 divisors (see below), whose sum is σ = 31546519704. Its totient is φ = 10515506566.

The previous prime is 21031013131. The next prime is 21031013137. The reversal of 21031013134 is 43131013012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21031013131) and next prime (21031013137).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031013131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257753282 + ... + 5257753285.

It is an arithmetic number, because the mean of its divisors is an integer number (7886629926).

Almost surely, 2^21031013134 is an apocalyptic number.

21031013134 is a deficient number, since it is larger than the sum of its proper divisors (10515506570).

21031013134 is a wasteful number, since it uses less digits than its factorization.

21031013134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10515506569.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21031013134 its reverse (43131013012), we get a palindrome (64162026146).

The spelling of 21031013134 in words is "twenty-one billion, thirty-one million, thirteen thousand, one hundred thirty-four".