21012332134 has 8 divisors (see below), whose sum is σ = 32888867760. Its totient is φ = 10049376216.

The previous prime is 21012332071. The next prime is 21012332147. The reversal of 21012332134 is 43123321012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228394869 + ... + 228394960.

It is an arithmetic number, because the mean of its divisors is an integer number (4111108470).

Almost surely, 2^21012332134 is an apocalyptic number.

21012332134 is a deficient number, since it is larger than the sum of its proper divisors (11876535626).

21012332134 is a wasteful number, since it uses less digits than its factorization.

21012332134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456789854.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21012332134 its reverse (43123321012), we get a palindrome (64135653146).

The spelling of 21012332134 in words is "twenty-one billion, twelve million, three hundred thirty-two thousand, one hundred thirty-four".