2012312212021 has 4 divisors (see below), whose sum is σ = 2012347814944. Its totient is φ = 2012276609100.

The previous prime is 2012312212003. The next prime is 2012312212051. The reversal of 2012312212021 is 1202122132102.

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 a cyclic number.

It is not a de Polignac number, because 2012312212021 - 2¹⁵ = 2012312179253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012312212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012312212051) 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, 17716545 + ... + 17829766.

It is an arithmetic number, because the mean of its divisors is an integer number (503086953736).

Almost surely, 2^{2012312212021} is an apocalyptic number.

It is an amenable number.

2012312212021 is a deficient number, since it is larger than the sum of its proper divisors (35602923).

2012312212021 is an equidigital number, since it uses as much as digits as its factorization.

2012312212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35602922.

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

Adding to 2012312212021 its reverse (1202122132102), we get a palindrome (3214434344123).

The spelling of 2012312212021 in words is "two trillion, twelve billion, three hundred twelve million, two hundred twelve thousand, twenty-one".