2012001121021 has 8 divisors (see below), whose sum is σ = 2015727699384. Its totient is φ = 2008276730880.

The previous prime is 2012001120967. The next prime is 2012001121037. The reversal of 2012001121021 is 1201211002102.

It can be written as a sum of positive squares in 4 ways, for example, as 51970320900 + 1960030800121 = 227970^2 + 1400011^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2012001121021 - 2¹⁹ = 2012000596733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012001120992 and 2012001121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012001125021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299345 + ... + 2390041.

It is an arithmetic number, because the mean of its divisors is an integer number (251965962423).

Almost surely, 2^{2012001121021} is an apocalyptic number.

It is an amenable number.

2012001121021 is a deficient number, since it is larger than the sum of its proper divisors (3726578363).

2012001121021 is a wasteful number, since it uses less digits than its factorization.

2012001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094111.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2012001121021 its reverse (1201211002102), we get a palindrome (3213212123123).

The spelling of 2012001121021 in words is "two trillion, twelve billion, one million, one hundred twenty-one thousand, twenty-one".