21012010221201 has 8 divisors (see below), whose sum is σ = 28080715740000. Its totient is φ = 13975655758272.

The previous prime is 21012010221187. The next prime is 21012010221203. The reversal of 21012010221201 is 10212201021012.

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

It is not a de Polignac number, because 21012010221201 - 2⁷ = 21012010221073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012010221203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8087762451 + ... + 8087765048.

It is an arithmetic number, because the mean of its divisors is an integer number (3510089467500).

Almost surely, 2^{21012010221201} is an apocalyptic number.

It is an amenable number.

21012010221201 is a deficient number, since it is larger than the sum of its proper divisors (7068705518799).

21012010221201 is a wasteful number, since it uses less digits than its factorization.

21012010221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16175527935.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21012010221201 its reverse (10212201021012), we get a palindrome (31224211242213).

The spelling of 21012010221201 in words is "twenty-one trillion, twelve billion, ten million, two hundred twenty-one thousand, two hundred one".