20031121101 has 16 divisors (see below), whose sum is σ = 26929686528. Its totient is φ = 13243406400.

The previous prime is 20031121069. The next prime is 20031121133. The reversal of 20031121101 is 10112113002.

It is an interprime number because it is at equal distance from previous prime (20031121069) and next prime (20031121133).

It is not a de Polignac number, because 20031121101 - 2⁵ = 20031121069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031121151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034731 + ... + 1053911.

It is an arithmetic number, because the mean of its divisors is an integer number (1683105408).

Almost surely, 2^20031121101 is an apocalyptic number.

It is an amenable number.

20031121101 is a deficient number, since it is larger than the sum of its proper divisors (6898565427).

20031121101 is a wasteful number, since it uses less digits than its factorization.

20031121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22052.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20031121101 its reverse (10112113002), we get a palindrome (30143234103).

The spelling of 20031121101 in words is "twenty billion, thirty-one million, one hundred twenty-one thousand, one hundred one".