2012201100021 has 16 divisors (see below), whose sum is σ = 3066524296704. Its totient is φ = 1149711788784.

The previous prime is 2012201100011. The next prime is 2012201100031. The reversal of 2012201100021 is 1200011022102.

It is an interprime number because it is at equal distance from previous prime (2012201100011) and next prime (2012201100031).

It is a de Polignac number, because none of the positive numbers 2^k-2012201100021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012201100011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4681371 + ... + 5093096.

It is an arithmetic number, because the mean of its divisors is an integer number (191657768544).

Almost surely, 2^{2012201100021} is an apocalyptic number.

2012201100021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2012201100021 is a deficient number, since it is larger than the sum of its proper divisors (1054323196683).

2012201100021 is an equidigital number, since it uses as much as digits as its factorization.

2012201100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9784280.

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

Adding to 2012201100021 its reverse (1200011022102), we get a palindrome (3212212122123).

The spelling of 2012201100021 in words is "two trillion, twelve billion, two hundred one million, one hundred thousand, twenty-one".