220120100121 has 16 divisors (see below), whose sum is σ = 302973459968. Its totient is φ = 142007126400.

The previous prime is 220120100107. The next prime is 220120100129. The reversal of 220120100121 is 121001021022.

It is not a de Polignac number, because 220120100121 - 2⁹ = 220120099609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220120100097 and 220120100106.

It is not an unprimeable number, because it can be changed into a prime (220120100129) 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, 4347411 + ... + 4397751.

It is an arithmetic number, because the mean of its divisors is an integer number (18935841248).

Almost surely, 2^220120100121 is an apocalyptic number.

It is an amenable number.

220120100121 is a deficient number, since it is larger than the sum of its proper divisors (82853359847).

220120100121 is a wasteful number, since it uses less digits than its factorization.

220120100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97392.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 220120100121 its reverse (121001021022), we get a palindrome (341121121143).

The spelling of 220120100121 in words is "two hundred twenty billion, one hundred twenty million, one hundred thousand, one hundred twenty-one".