10201200120021 has 4 divisors (see below), whose sum is σ = 13601600160032. Its totient is φ = 6800800080012.

The previous prime is 10201200119989. The next prime is 10201200120029. The reversal of 10201200120021 is 12002100210201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10201200120021 - 2⁵ = 10201200119989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10201200119979 and 10201200120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201200120029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700200020001 + ... + 1700200020006.

It is an arithmetic number, because the mean of its divisors is an integer number (3400400040008).

Almost surely, 2^{10201200120021} is an apocalyptic number.

It is an amenable number.

10201200120021 is a deficient number, since it is larger than the sum of its proper divisors (3400400040011).

10201200120021 is an equidigital number, since it uses as much as digits as its factorization.

10201200120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400400040010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10201200120021 its reverse (12002100210201), we get a palindrome (22203300330222).

The spelling of 10201200120021 in words is "ten trillion, two hundred one billion, two hundred million, one hundred twenty thousand, twenty-one".