21134211234 has 16 divisors (see below), whose sum is σ = 42642480672. Its totient is φ = 6982394048.

The previous prime is 21134211223. The next prime is 21134211269. The reversal of 21134211234 is 43211243112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15585024 + ... + 15586379.

It is an arithmetic number, because the mean of its divisors is an integer number (2665155042).

Almost surely, 2^21134211234 is an apocalyptic number.

21134211234 is an abundant number, since it is smaller than the sum of its proper divisors (21508269438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21134211234 is a wasteful number, since it uses less digits than its factorization.

21134211234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31171521.

The product of its digits is 1152, while the sum is 24.

Adding to 21134211234 its reverse (43211243112), we get a palindrome (64345454346).

The spelling of 21134211234 in words is "twenty-one billion, one hundred thirty-four million, two hundred eleven thousand, two hundred thirty-four".