20201121011011 has 16 divisors (see below), whose sum is σ = 20543367626496. Its totient is φ = 19860552180000.

The previous prime is 20201121010859. The next prime is 20201121011021. The reversal of 20201121011011 is 11011012110202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20201121011011 - 2²³ = 20201112622403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201121010982 and 20201121011000.

It is not an unprimeable number, because it can be changed into a prime (20201121011021) 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, 37884316 + ... + 38413846.

It is an arithmetic number, because the mean of its divisors is an integer number (1283960476656).

Almost surely, 2^{20201121011011} is an apocalyptic number.

20201121011011 is a deficient number, since it is larger than the sum of its proper divisors (342246615485).

20201121011011 is an equidigital number, since it uses as much as digits as its factorization.

20201121011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531114.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20201121011011 its reverse (11011012110202), we get a palindrome (31212133121213).

The spelling of 20201121011011 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, eleven thousand, eleven".