21141036073 has 2 divisors, whose sum is σ = 21141036074. Its totient is φ = 21141036072.

The previous prime is 21141036023. The next prime is 21141036079. The reversal of 21141036073 is 37063014112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20687644224 + 453391849 = 143832^2 + 21293^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141036073 - 2²⁵ = 21107481641 is a prime.

It is a super-2 number, since 2×21141036073² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21141036079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570518036 + 10570518037.

It is an arithmetic number, because the mean of its divisors is an integer number (10570518037).

Almost surely, 2^21141036073 is an apocalyptic number.

It is an amenable number.

21141036073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141036073 is an equidigital number, since it uses as much as digits as its factorization.

21141036073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The spelling of 21141036073 in words is "twenty-one billion, one hundred forty-one million, thirty-six thousand, seventy-three".