20001121000101 has 16 divisors (see below), whose sum is σ = 29988293872320. Its totient is φ = 13173429090960.

The previous prime is 20001121000057. The next prime is 20001121000129. The reversal of 20001121000101 is 10100012110002.

It is a happy number.

It is not a de Polignac number, because 20001121000101 - 2¹⁷ = 20001120869029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001121000141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4462541490 + ... + 4462545971.

It is an arithmetic number, because the mean of its divisors is an integer number (1874268367020).

Almost surely, 2^{20001121000101} is an apocalyptic number.

It is an amenable number.

20001121000101 is a deficient number, since it is larger than the sum of its proper divisors (9987172872219).

20001121000101 is an equidigital number, since it uses as much as digits as its factorization.

20001121000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8925087553 (or 8925087547 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20001121000101 its reverse (10100012110002), we get a palindrome (30101133110103).

The spelling of 20001121000101 in words is "twenty trillion, one billion, one hundred twenty-one million, one hundred one", and thus it is an aban number.