21000012132134 has 48 divisors (see below), whose sum is σ = 38922299072208. Its totient is φ = 8443530321408.

The previous prime is 21000012132119. The next prime is 21000012132191. The reversal of 21000012132134 is 43123121000012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19614404 + ... + 20657319.

It is an arithmetic number, because the mean of its divisors is an integer number (810881230671).

Almost surely, 2^{21000012132134} is an apocalyptic number.

21000012132134 is a deficient number, since it is larger than the sum of its proper divisors (17922286940074).

21000012132134 is a wasteful number, since it uses less digits than its factorization.

21000012132134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40272069 (or 40272062 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21000012132134 its reverse (43123121000012), we get a palindrome (64123133132146).

The spelling of 21000012132134 in words is "twenty-one trillion, twelve million, one hundred thirty-two thousand, one hundred thirty-four".