20120021102201 has 4 divisors (see below), whose sum is σ = 20120120715252. Its totient is φ = 20119921489152.

The previous prime is 20120021102189. The next prime is 20120021102243. The reversal of 20120021102201 is 10220112002102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2061303404176 + 18058717698025 = 1435724^2 + 4249555^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120021102201 - 2¹⁰ = 20120021101177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120011102201) 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, 49502936 + ... + 49907721.

It is an arithmetic number, because the mean of its divisors is an integer number (5030030178813).

Almost surely, 2^{20120021102201} is an apocalyptic number.

It is an amenable number.

20120021102201 is a deficient number, since it is larger than the sum of its proper divisors (99613051).

20120021102201 is an equidigital number, since it uses as much as digits as its factorization.

20120021102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99613050.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20120021102201 its reverse (10220112002102), we get a palindrome (30340133104303).

The spelling of 20120021102201 in words is "twenty trillion, one hundred twenty billion, twenty-one million, one hundred two thousand, two hundred one".