20201210021101 has 4 divisors (see below), whose sum is σ = 20202717700000. Its totient is φ = 20199702342204.

The previous prime is 20201210021081. The next prime is 20201210021123. The reversal of 20201210021101 is 10112001210202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20201210021101 - 2³¹ = 20199062537453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201210021801) 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, 753819351 + ... + 753846148.

It is an arithmetic number, because the mean of its divisors is an integer number (5050679425000).

Almost surely, 2^{20201210021101} is an apocalyptic number.

It is an amenable number.

20201210021101 is a deficient number, since it is larger than the sum of its proper divisors (1507678899).

20201210021101 is a wasteful number, since it uses less digits than its factorization.

20201210021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507678898.

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

Adding to 20201210021101 its reverse (10112001210202), we get a palindrome (30313211231303).

The spelling of 20201210021101 in words is "twenty trillion, two hundred one billion, two hundred ten million, twenty-one thousand, one hundred one".