21101434034 has 4 divisors (see below), whose sum is σ = 31652151054. Its totient is φ = 10550717016.

The previous prime is 21101434033. The next prime is 21101434037. The reversal of 21101434034 is 43043410112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16510965025 + 4590469009 = 128495^2 + 67753^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21101434033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275358507 + ... + 5275358510.

Almost surely, 2^21101434034 is an apocalyptic number.

21101434034 is a deficient number, since it is larger than the sum of its proper divisors (10550717020).

21101434034 is a wasteful number, since it uses less digits than its factorization.

21101434034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550717019.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21101434034 its reverse (43043410112), we get a palindrome (64144844146).

The spelling of 21101434034 in words is "twenty-one billion, one hundred one million, four hundred thirty-four thousand, thirty-four".