220121002111 has 16 divisors (see below), whose sum is σ = 223711488000. Its totient is φ = 216569092608.

The previous prime is 220121002109. The next prime is 220121002181. The reversal of 220121002111 is 111200121022.

It is a cyclic number.

It is not a de Polignac number, because 220121002111 - 2¹ = 220121002109 is a prime.

It is a super-4 number, since 4×220121002111⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121002091 and 220121002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121002181) 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, 6396810 + ... + 6431128.

It is an arithmetic number, because the mean of its divisors is an integer number (13981968000).

Almost surely, 2^220121002111 is an apocalyptic number.

220121002111 is a deficient number, since it is larger than the sum of its proper divisors (3590485889).

220121002111 is a wasteful number, since it uses less digits than its factorization.

220121002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34878.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220121002111 its reverse (111200121022), we get a palindrome (331321123133).

The spelling of 220121002111 in words is "two hundred twenty billion, one hundred twenty-one million, two thousand, one hundred eleven".