2012212010021 has 4 divisors (see below), whose sum is σ = 2012322704844. Its totient is φ = 2012101315200.

The previous prime is 2012212009981. The next prime is 2012212010041. The reversal of 2012212010021 is 1200102122102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1983858165025 + 28353844996 = 1408495^2 + 168386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012212010021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012212009978 and 2012212010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012212010041) 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, 55320140 + ... + 55356501.

It is an arithmetic number, because the mean of its divisors is an integer number (503080676211).

Almost surely, 2^{2012212010021} is an apocalyptic number.

It is an amenable number.

2012212010021 is a deficient number, since it is larger than the sum of its proper divisors (110694823).

2012212010021 is a wasteful number, since it uses less digits than its factorization.

2012212010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110694822.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2012212010021 its reverse (1200102122102), we get a palindrome (3212314132123).

The spelling of 2012212010021 in words is "two trillion, twelve billion, two hundred twelve million, ten thousand, twenty-one".