220002100121021 has 4 divisors (see below), whose sum is σ = 221153943577344. Its totient is φ = 218850256664700.

The previous prime is 220002100120931. The next prime is 220002100121077. The reversal of 220002100121021 is 120121001200022.

220002100121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-220002100121021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220002100120987 and 220002100121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220002100124021) 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, 575921727875 + ... + 575921728256.

It is an arithmetic number, because the mean of its divisors is an integer number (55288485894336).

Almost surely, 2^{220002100121021} is an apocalyptic number.

It is an amenable number.

220002100121021 is a deficient number, since it is larger than the sum of its proper divisors (1151843456323).

220002100121021 is a wasteful number, since it uses less digits than its factorization.

220002100121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151843456322.

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

Adding to 220002100121021 its reverse (120121001200022), we get a palindrome (340123101321043).

The spelling of 220002100121021 in words is "two hundred twenty trillion, two billion, one hundred million, one hundred twenty-one thousand, twenty-one".