20010101022021 has 32 divisors (see below), whose sum is σ = 29129916211200. Its totient is φ = 12117206142080.

The previous prime is 20010101022019. The next prime is 20010101022083. The reversal of 20010101022021 is 12022010101002.

It is a cyclic number.

It is not a de Polignac number, because 20010101022021 - 2¹ = 20010101022019 is a prime.

It is a super-2 number, since 2×20010101022021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20010101021988 and 20010101022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010101021021) 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, 261166300 + ... + 261242906.

It is an arithmetic number, because the mean of its divisors is an integer number (910309881600).

Almost surely, 2^{20010101022021} is an apocalyptic number.

It is an amenable number.

20010101022021 is a deficient number, since it is larger than the sum of its proper divisors (9119815189179).

20010101022021 is a wasteful number, since it uses less digits than its factorization.

20010101022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83129.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20010101022021 its reverse (12022010101002), we get a palindrome (32032111123023).

The spelling of 20010101022021 in words is "twenty trillion, ten billion, one hundred one million, twenty-two thousand, twenty-one".