220121221210121 has 8 divisors (see below), whose sum is σ = 274436847223104. Its totient is φ = 171523029514320.

The previous prime is 220121221210087. The next prime is 220121221210141. The reversal of 220121221210121 is 121012122121022.

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

It is not a de Polignac number, because 220121221210121 - 2⁴² = 215723174699017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121221210093 and 220121221210102.

It is not an unprimeable number, because it can be changed into a prime (220121221210141) 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, 1429358579210 + ... + 1429358579363.

It is an arithmetic number, because the mean of its divisors is an integer number (34304605902888).

Almost surely, 2^{220121221210121} is an apocalyptic number.

It is an amenable number.

220121221210121 is a deficient number, since it is larger than the sum of its proper divisors (54315626012983).

220121221210121 is a wasteful number, since it uses less digits than its factorization.

220121221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858717158591.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 220121221210121 its reverse (121012122121022), we get a palindrome (341133343331143).

The spelling of 220121221210121 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".