20211002121101 has 6 divisors (see below), whose sum is σ = 22215399025806. Its totient is φ = 18373638291800.

The previous prime is 20211002121091. The next prime is 20211002121113. The reversal of 20211002121101 is 10112120011202.

It can be written as a sum of positive squares in only one way, i.e., 10427900559076 + 9783101562025 = 3229226^2 + 3127795^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20211002121101 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 (20211002181101) 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 5 ways as a sum of consecutive naturals, for example, 83516537570 + ... + 83516537811.

It is an arithmetic number, because the mean of its divisors is an integer number (3702566504301).

Almost surely, 2^{20211002121101} is an apocalyptic number.

It is an amenable number.

20211002121101 is a deficient number, since it is larger than the sum of its proper divisors (2004396904705).

20211002121101 is a wasteful number, since it uses less digits than its factorization.

20211002121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167033075403 (or 167033075392 counting only the distinct ones).

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

Adding to 20211002121101 its reverse (10112120011202), we get a palindrome (30323122132303).

The spelling of 20211002121101 in words is "twenty trillion, two hundred eleven billion, two million, one hundred twenty-one thousand, one hundred one".