220021101000121 has 16 divisors (see below), whose sum is σ = 221917998476160. Its totient is φ = 218131603119360.

The previous prime is 220021101000097. The next prime is 220021101000167. The reversal of 220021101000121 is 121000101120022.

It is a cyclic number.

It is not a de Polignac number, because 220021101000121 - 2⁵ = 220021101000089 is a prime.

It is a super-2 number, since 2×220021101000121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220021101000191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355785441 + ... + 356403313.

It is an arithmetic number, because the mean of its divisors is an integer number (13869874904760).

Almost surely, 2^{220021101000121} is an apocalyptic number.

It is an amenable number.

220021101000121 is a deficient number, since it is larger than the sum of its proper divisors (1896897476039).

220021101000121 is a wasteful number, since it uses less digits than its factorization.

220021101000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623856.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220021101000121 its reverse (121000101120022), we get a palindrome (341021202120143).

The spelling of 220021101000121 in words is "two hundred twenty trillion, twenty-one billion, one hundred one million, one hundred twenty-one", and thus it is an aban number.