21012102010201 has 8 divisors (see below), whose sum is σ = 21025404912960. Its totient is φ = 20998803291792.

The previous prime is 21012102010073. The next prime is 21012102010231. The reversal of 21012102010201 is 10201020121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21012102010201 - 2⁷ = 21012102010073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012102010231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9030966 + ... + 11116768.

It is an arithmetic number, because the mean of its divisors is an integer number (2628175614120).

Almost surely, 2^{21012102010201} is an apocalyptic number.

It is an amenable number.

21012102010201 is a deficient number, since it is larger than the sum of its proper divisors (13302902759).

21012102010201 is a wasteful number, since it uses less digits than its factorization.

21012102010201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092175.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21012102010201 its reverse (10201020121012), we get a palindrome (31213122131213).

It can be divided in two parts, 21012 and 102010201, that multiplied together give a palindrome (2143438343412).

The spelling of 21012102010201 in words is "twenty-one trillion, twelve billion, one hundred two million, ten thousand, two hundred one".