20201101112021 has 4 divisors (see below), whose sum is σ = 21389401177452. Its totient is φ = 19012801046592.

The previous prime is 20201101112009. The next prime is 20201101112083. The reversal of 20201101112021 is 12021110110202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12640058541796 + 7561042570225 = 3555286^2 + 2749735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201101112021 is a prime.

It is a super-2 number, since 2×20201101112021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201101111987 and 20201101112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201101114021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594150032690 + ... + 594150032723.

It is an arithmetic number, because the mean of its divisors is an integer number (5347350294363).

Almost surely, 2^{20201101112021} is an apocalyptic number.

It is an amenable number.

20201101112021 is a deficient number, since it is larger than the sum of its proper divisors (1188300065431).

20201101112021 is a wasteful number, since it uses less digits than its factorization.

20201101112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188300065430.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20201101112021 its reverse (12021110110202), we get a palindrome (32222211222223).

The spelling of 20201101112021 in words is "twenty trillion, two hundred one billion, one hundred one million, one hundred twelve thousand, twenty-one".