21101200007 has 2 divisors, whose sum is σ = 21101200008. Its totient is φ = 21101200006.

The previous prime is 21101199991. The next prime is 21101200033. The reversal of 21101200007 is 70000210112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101200007 - 2⁴ = 21101199991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101199964 and 21101200000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101200067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550600003 + 10550600004.

It is an arithmetic number, because the mean of its divisors is an integer number (10550600004).

Almost surely, 2^21101200007 is an apocalyptic number.

21101200007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101200007 is an equidigital number, since it uses as much as digits as its factorization.

21101200007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

Adding to 21101200007 its reverse (70000210112), we get a palindrome (91101410119).

The spelling of 21101200007 in words is "twenty-one billion, one hundred one million, two hundred thousand, seven".