21120045007 has 2 divisors, whose sum is σ = 21120045008. Its totient is φ = 21120045006.

The previous prime is 21120044893. The next prime is 21120045019. The reversal of 21120045007 is 70054002112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120045007 - 2²³ = 21111656399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120045407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560022503 + 10560022504.

It is an arithmetic number, because the mean of its divisors is an integer number (10560022504).

Almost surely, 2^21120045007 is an apocalyptic number.

21120045007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120045007 is an equidigital number, since it uses as much as digits as its factorization.

21120045007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

Adding to 21120045007 its reverse (70054002112), we get a palindrome (91174047119).

The spelling of 21120045007 in words is "twenty-one billion, one hundred twenty million, forty-five thousand, seven".