20210101022021 has 8 divisors (see below), whose sum is σ = 20552804546400. Its totient is φ = 19867402812400.

The previous prime is 20210101022003. The next prime is 20210101022087. The reversal of 20210101022021 is 12022010101202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20210101022021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20210101021987 and 20210101022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210101022621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6754475 + ... + 9275943.

It is an arithmetic number, because the mean of its divisors is an integer number (2569100568300).

Almost surely, 2^{20210101022021} is an apocalyptic number.

It is an amenable number.

20210101022021 is a deficient number, since it is larger than the sum of its proper divisors (342703524379).

20210101022021 is a wasteful number, since it uses less digits than its factorization.

20210101022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657379.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20210101022021 its reverse (12022010101202), we get a palindrome (32232111123223).

The spelling of 20210101022021 in words is "twenty trillion, two hundred ten billion, one hundred one million, twenty-two thousand, twenty-one".