2220100012021 has 4 divisors (see below), whose sum is σ = 2274248792844. Its totient is φ = 2165951231200.

The previous prime is 2220100012019. The next prime is 2220100012027. The reversal of 2220100012021 is 1202100010222.

It is a happy number.

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 86277312900 + 2133822699121 = 293730^2 + 1460761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220100012021 - 2¹ = 2220100012019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220100011992 and 2220100012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220100012027) 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, 27074390350 + ... + 27074390431.

It is an arithmetic number, because the mean of its divisors is an integer number (568562198211).

Almost surely, 2^{2220100012021} is an apocalyptic number.

It is an amenable number.

2220100012021 is a deficient number, since it is larger than the sum of its proper divisors (54148780823).

2220100012021 is an equidigital number, since it uses as much as digits as its factorization.

2220100012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54148780822.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2220100012021 its reverse (1202100010222), we get a palindrome (3422200022243).

The spelling of 2220100012021 in words is "two trillion, two hundred twenty billion, one hundred million, twelve thousand, twenty-one".