220101222121 has 16 divisors (see below), whose sum is σ = 256751762688. Its totient is φ = 186457312000.

The previous prime is 220101222097. The next prime is 220101222127. The reversal of 220101222121 is 121222101022.

It is a happy number.

It is not a de Polignac number, because 220101222121 - 2²¹ = 220099124969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220101222095 and 220101222104.

It is not an unprimeable number, because it can be changed into a prime (220101222127) 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, 5807905 + ... + 5845678.

It is an arithmetic number, because the mean of its divisors is an integer number (16046985168).

Almost surely, 2^220101222121 is an apocalyptic number.

It is an amenable number.

220101222121 is a deficient number, since it is larger than the sum of its proper divisors (36650540567).

220101222121 is a wasteful number, since it uses less digits than its factorization.

220101222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11653712.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220101222121 its reverse (121222101022), we get a palindrome (341323323143).

The spelling of 220101222121 in words is "two hundred twenty billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-one".