21134031101 has 2 divisors, whose sum is σ = 21134031102. Its totient is φ = 21134031100.

The previous prime is 21134031067. The next prime is 21134031119. The reversal of 21134031101 is 10113043112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18319622500 + 2814408601 = 135350^2 + 53051^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134031101 - 2¹⁴ = 21134014717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21134031101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21134031131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567015550 + 10567015551.

It is an arithmetic number, because the mean of its divisors is an integer number (10567015551).

Almost surely, 2^21134031101 is an apocalyptic number.

It is an amenable number.

21134031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134031101 is an equidigital number, since it uses as much as digits as its factorization.

21134031101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21134031101 its reverse (10113043112), we get a palindrome (31247074213).

The spelling of 21134031101 in words is "twenty-one billion, one hundred thirty-four million, thirty-one thousand, one hundred one".