2012021211021 has 4 divisors (see below), whose sum is σ = 2682694948032. Its totient is φ = 1341347474012.

The previous prime is 2012021210963. The next prime is 2012021211061. The reversal of 2012021211021 is 1201121202102.

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 2012021211021 - 2¹¹ = 2012021208973 is a prime.

It is a super-2 number, since 2×2012021211021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012021211061) 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, 335336868501 + ... + 335336868506.

It is an arithmetic number, because the mean of its divisors is an integer number (670673737008).

Almost surely, 2^{2012021211021} is an apocalyptic number.

It is an amenable number.

2012021211021 is a deficient number, since it is larger than the sum of its proper divisors (670673737011).

2012021211021 is an equidigital number, since it uses as much as digits as its factorization.

2012021211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670673737010.

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

Adding to 2012021211021 its reverse (1201121202102), we get a palindrome (3213142413123).

The spelling of 2012021211021 in words is "two trillion, twelve billion, twenty-one million, two hundred eleven thousand, twenty-one".