220021021121 has 8 divisors (see below), whose sum is σ = 240187461600. Its totient is φ = 199882002240.

The previous prime is 220021021097. The next prime is 220021021133. The reversal of 220021021121 is 121120120022.

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

It is a cyclic number.

It is not a de Polignac number, because 220021021121 - 2¹⁸ = 220020758977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220021021096 and 220021021105.

It is not an unprimeable number, because it can be changed into a prime (220021021151) 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, 6838616 + ... + 6870713.

It is an arithmetic number, because the mean of its divisors is an integer number (30023432700).

Almost surely, 2^220021021121 is an apocalyptic number.

It is an amenable number.

220021021121 is a deficient number, since it is larger than the sum of its proper divisors (20166440479).

220021021121 is a wasteful number, since it uses less digits than its factorization.

220021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13710799.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220021021121 its reverse (121120120022), we get a palindrome (341141141143).

The spelling of 220021021121 in words is "two hundred twenty billion, twenty-one million, twenty-one thousand, one hundred twenty-one".