21120037370287 has 2 divisors, whose sum is σ = 21120037370288. Its totient is φ = 21120037370286.

The previous prime is 21120037370209. The next prime is 21120037370291. The reversal of 21120037370287 is 78207373002112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120037370287 - 2¹¹ = 21120037368239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120037370687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560018685143 + 10560018685144.

It is an arithmetic number, because the mean of its divisors is an integer number (10560018685144).

Almost surely, 2^{21120037370287} is an apocalyptic number.

21120037370287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120037370287 is an equidigital number, since it uses as much as digits as its factorization.

21120037370287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 21120037370287 in words is "twenty-one trillion, one hundred twenty billion, thirty-seven million, three hundred seventy thousand, two hundred eighty-seven".