21120200101 has 32 divisors (see below), whose sum is σ = 29849702400. Its totient is φ = 14391794880.

The previous prime is 21120200077. The next prime is 21120200111. The reversal of 21120200101 is 10100202112.

It is a cyclic number.

It is not a de Polignac number, because 21120200101 - 2⁹ = 21120199589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120200111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536221 + ... + 574258.

It is an arithmetic number, because the mean of its divisors is an integer number (932803200).

Almost surely, 2^21120200101 is an apocalyptic number.

It is an amenable number.

21120200101 is a deficient number, since it is larger than the sum of its proper divisors (8729502299).

21120200101 is a wasteful number, since it uses less digits than its factorization.

21120200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110529.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21120200101 its reverse (10100202112), we get a palindrome (31220402213).

The spelling of 21120200101 in words is "twenty-one billion, one hundred twenty million, two hundred thousand, one hundred one".