220111010210121 has 32 divisors (see below), whose sum is σ = 309013417152000. Its totient is φ = 138978927698688.

The previous prime is 220111010210033. The next prime is 220111010210137. The reversal of 220111010210121 is 121012010111022.

It is a happy number.

It is not a de Polignac number, because 220111010210121 - 2¹⁸ = 220111009947977 is a prime.

It is a super-3 number, since 3×220111010210121³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 220111010210121.

It is not an unprimeable number, because it can be changed into a prime (220111010210191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4186265010 + ... + 4186317588.

It is an arithmetic number, because the mean of its divisors is an integer number (9656669286000).

Almost surely, 2^{220111010210121} is an apocalyptic number.

It is an amenable number.

220111010210121 is a deficient number, since it is larger than the sum of its proper divisors (88902406941879).

220111010210121 is a wasteful number, since it uses less digits than its factorization.

220111010210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71573.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 220111010210121 its reverse (121012010111022), we get a palindrome (341123020321143).

Subtracting from 220111010210121 its reverse (121012010111022), we obtain a palindrome (99099000099099).

The spelling of 220111010210121 in words is "two hundred twenty trillion, one hundred eleven billion, ten million, two hundred ten thousand, one hundred twenty-one".