220120122101021 has 4 divisors (see below), whose sum is σ = 220134604656000. Its totient is φ = 220105639546044.

The previous prime is 220120122100999. The next prime is 220120122101041. The reversal of 220120122101021 is 120101221021022.

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 220120122101021 - 2¹⁴ = 220120122084637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120122101041) 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, 7241254691 + ... + 7241285088.

It is an arithmetic number, because the mean of its divisors is an integer number (55033651164000).

Almost surely, 2^{220120122101021} is an apocalyptic number.

It is an amenable number.

220120122101021 is a deficient number, since it is larger than the sum of its proper divisors (14482554979).

220120122101021 is a wasteful number, since it uses less digits than its factorization.

220120122101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14482554978.

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

Adding to 220120122101021 its reverse (120101221021022), we get a palindrome (340221343122043).

The spelling of 220120122101021 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twenty-two million, one hundred one thousand, twenty-one".