20220101100121 has 16 divisors (see below), whose sum is σ = 21936112506000. Its totient is φ = 18527056063488.

The previous prime is 20220101100091. The next prime is 20220101100127. The reversal of 20220101100121 is 12100110102202.

It can be written as a sum of positive squares in 8 ways, for example, as 8837331745225 + 11382769354896 = 2972765^2 + 3373836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220101100121 is a prime.

It is a super-2 number, since 2×20220101100121² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220101100127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23276805 + ... + 24129853.

It is an arithmetic number, because the mean of its divisors is an integer number (1371007031625).

Almost surely, 2^{20220101100121} is an apocalyptic number.

It is an amenable number.

20220101100121 is a deficient number, since it is larger than the sum of its proper divisors (1716011405879).

20220101100121 is a wasteful number, since it uses less digits than its factorization.

20220101100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866508.

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

Adding to 20220101100121 its reverse (12100110102202), we get a palindrome (32320211202323).

The spelling of 20220101100121 in words is "twenty trillion, two hundred twenty billion, one hundred one million, one hundred thousand, one hundred twenty-one".