2012111220021 has 8 divisors (see below), whose sum is σ = 3066074240064. Its totient is φ = 1149777840000.

The previous prime is 2012111220017. The next prime is 2012111220043. The reversal of 2012111220021 is 1200221112102.

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

It is not a de Polignac number, because 2012111220021 - 2² = 2012111220017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012111220071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47907409980 + ... + 47907410021.

It is an arithmetic number, because the mean of its divisors is an integer number (383259280008).

Almost surely, 2^{2012111220021} is an apocalyptic number.

2012111220021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2012111220021 is a deficient number, since it is larger than the sum of its proper divisors (1053963020043).

2012111220021 is an equidigital number, since it uses as much as digits as its factorization.

2012111220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95814820011.

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

Adding to 2012111220021 its reverse (1200221112102), we get a palindrome (3212332332123).

The spelling of 2012111220021 in words is "two trillion, twelve billion, one hundred eleven million, two hundred twenty thousand, twenty-one".