220121121121 has 8 divisors (see below), whose sum is σ = 250572659904. Its totient is φ = 191409670320.

The previous prime is 220121121061. The next prime is 220121121127. The reversal of 220121121121 is 121121121022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220121121121 - 2¹¹ = 220121119073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121121095 and 220121121104.

It is not an unprimeable number, because it can be changed into a prime (220121121127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435021726 + ... + 435022231.

It is an arithmetic number, because the mean of its divisors is an integer number (31321582488).

Almost surely, 2^220121121121 is an apocalyptic number.

It is an amenable number.

220121121121 is a deficient number, since it is larger than the sum of its proper divisors (30451538783).

220121121121 is a wasteful number, since it uses less digits than its factorization.

220121121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870043991.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 220121121121 its reverse (121121121022), we get a palindrome (341242242143).

Subtracting from 220121121121 its reverse (121121121022), we obtain a palindrome (99000000099).

The spelling of 220121121121 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".