20201121121090 has 128 divisors (see below), whose sum is σ = 47125406845440. Its totient is φ = 6054681581568.

The previous prime is 20201121121073. The next prime is 20201121121091. The reversal of 20201121121090 is 9012112110202.

It is not an unprimeable number, because it can be changed into a prime (20201121121091) 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 63 ways as a sum of consecutive naturals, for example, 48845814 + ... + 49257646.

It is an arithmetic number, because the mean of its divisors is an integer number (368167240980).

Almost surely, 2^{20201121121090} is an apocalyptic number.

20201121121090 is an abundant number, since it is smaller than the sum of its proper divisors (26924285724350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20201121121090 is a wasteful number, since it uses less digits than its factorization.

20201121121090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414716.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 20201121121090 its reverse (9012112110202), we get a palindrome (29213233231292).

The spelling of 20201121121090 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-one thousand, ninety".