21211432134 has 32 divisors (see below), whose sum is σ = 44924751360. Its totient is φ = 6653615232.

The previous prime is 21211432133. The next prime is 21211432169. The reversal of 21211432134 is 43123411212.

It is a super-4 number, since 4×21211432134⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211432133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137127 + ... + 1155629.

It is an arithmetic number, because the mean of its divisors is an integer number (1403898480).

Almost surely, 2^21211432134 is an apocalyptic number.

21211432134 is an abundant number, since it is smaller than the sum of its proper divisors (23713319226).

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

21211432134 is a wasteful number, since it uses less digits than its factorization.

21211432134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29764.

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

Adding to 21211432134 its reverse (43123411212), we get a palindrome (64334843346).

The spelling of 21211432134 in words is "twenty-one billion, two hundred eleven million, four hundred thirty-two thousand, one hundred thirty-four".