220221100102121 has 4 divisors (see below), whose sum is σ = 221679517983744. Its totient is φ = 218762682220500.

The previous prime is 220221100102103. The next prime is 220221100102141. The reversal of 220221100102121 is 121201001122022.

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 not a de Polignac number, because 220221100102121 - 2⁶ = 220221100102057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220221100102121.

It is not an unprimeable number, because it can be changed into a prime (220221100102141) 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, 729208940585 + ... + 729208940886.

It is an arithmetic number, because the mean of its divisors is an integer number (55419879495936).

Almost surely, 2^{220221100102121} is an apocalyptic number.

It is an amenable number.

220221100102121 is a deficient number, since it is larger than the sum of its proper divisors (1458417881623).

220221100102121 is a wasteful number, since it uses less digits than its factorization.

220221100102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458417881622.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220221100102121 its reverse (121201001122022), we get a palindrome (341422101224143).

The spelling of 220221100102121 in words is "two hundred twenty trillion, two hundred twenty-one billion, one hundred million, one hundred two thousand, one hundred twenty-one".