2012312220121 has 12 divisors (see below), whose sum is σ = 2341831335732. Its totient is φ = 1724118160128.

The previous prime is 2012312220089. The next prime is 2012312220133. The reversal of 2012312220121 is 1210222132102.

It can be written as a sum of positive squares in 2 ways, for example, as 906943856896 + 1105368363225 = 952336^2 + 1051365^2 .

It is not a de Polignac number, because 2012312220121 - 2⁵ = 2012312220089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2012312220151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8463520 + ... + 8698033.

It is an arithmetic number, because the mean of its divisors is an integer number (195152611311).

Almost surely, 2^{2012312220121} is an apocalyptic number.

It is an amenable number.

2012312220121 is a deficient number, since it is larger than the sum of its proper divisors (329519115611).

2012312220121 is a wasteful number, since it uses less digits than its factorization.

2012312220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17163960 (or 17163953 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2012312220121 its reverse (1210222132102), we get a palindrome (3222534352223).

The spelling of 2012312220121 in words is "two trillion, twelve billion, three hundred twelve million, two hundred twenty thousand, one hundred twenty-one".