2212121013021 has 6 divisors (see below), whose sum is σ = 3195285907710. Its totient is φ = 1474747342008.

The previous prime is 2212121013019. The next prime is 2212121013023. The reversal of 2212121013021 is 1203101212122.

2212121013021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2212121013019) and next prime (2212121013023).

It can be written as a sum of positive squares in only one way, i.e., 2190432560121 + 21688452900 = 1480011^2 + 147270^2 .

It is not a de Polignac number, because 2212121013021 - 2¹ = 2212121013019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212121012985 and 2212121013003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212121013023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122895611826 + ... + 122895611843.

It is an arithmetic number, because the mean of its divisors is an integer number (532547651285).

Almost surely, 2^{2212121013021} is an apocalyptic number.

It is an amenable number.

2212121013021 is a deficient number, since it is larger than the sum of its proper divisors (983164894689).

2212121013021 is a wasteful number, since it uses less digits than its factorization.

2212121013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245791223675 (or 245791223672 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2212121013021 its reverse (1203101212122), we get a palindrome (3415222225143).

The spelling of 2212121013021 in words is "two trillion, two hundred twelve billion, one hundred twenty-one million, thirteen thousand, twenty-one".