21134201204 has 12 divisors (see below), whose sum is σ = 36988141344. Its totient is φ = 10566160824.

The previous prime is 21134201203. The next prime is 21134201233. The reversal of 21134201204 is 40210243112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134201203) 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, 183074 + ... + 275289.

It is an arithmetic number, because the mean of its divisors is an integer number (3082345112).

Almost surely, 2^21134201204 is an apocalyptic number.

It is an amenable number.

21134201204 is a deficient number, since it is larger than the sum of its proper divisors (15853940140).

21134201204 is a wasteful number, since it uses less digits than its factorization.

21134201204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469894 (or 469892 counting only the distinct ones).

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

Adding to 21134201204 its reverse (40210243112), we get a palindrome (61344444316).

The spelling of 21134201204 in words is "twenty-one billion, one hundred thirty-four million, two hundred one thousand, two hundred four".