2002220111021 has 4 divisors (see below), whose sum is σ = 2156237042652. Its totient is φ = 1848203179392.

The previous prime is 2002220111009. The next prime is 2002220111053. The reversal of 2002220111021 is 1201110222002.

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 143739556900 + 1858480554121 = 379130^2 + 1363261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002220111021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002220110987 and 2002220111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002220119021) 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, 77008465796 + ... + 77008465821.

It is an arithmetic number, because the mean of its divisors is an integer number (539059260663).

Almost surely, 2^{2002220111021} is an apocalyptic number.

It is an amenable number.

2002220111021 is a deficient number, since it is larger than the sum of its proper divisors (154016931631).

2002220111021 is a wasteful number, since it uses less digits than its factorization.

2002220111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154016931630.

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

Adding to 2002220111021 its reverse (1201110222002), we get a palindrome (3203330333023).

The spelling of 2002220111021 in words is "two trillion, two billion, two hundred twenty million, one hundred eleven thousand, twenty-one".