20011333211121 has 48 divisors (see below), whose sum is σ = 32864933286720. Its totient is φ = 10762010219520.

The previous prime is 20011333211119. The next prime is 20011333211141. The reversal of 20011333211121 is 12111233311002.

It is not a de Polignac number, because 20011333211121 - 2¹ = 20011333211119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20011333211101) 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 47 ways as a sum of consecutive naturals, for example, 77687781 + ... + 77944941.

It is an arithmetic number, because the mean of its divisors is an integer number (684686110140).

Almost surely, 2^{20011333211121} is an apocalyptic number.

20011333211121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20011333211121 is a deficient number, since it is larger than the sum of its proper divisors (12853600075599).

20011333211121 is a wasteful number, since it uses less digits than its factorization.

20011333211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288334 (or 288327 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 20011333211121 its reverse (12111233311002), we get a palindrome (32122566522123).

The spelling of 20011333211121 in words is "twenty trillion, eleven billion, three hundred thirty-three million, two hundred eleven thousand, one hundred twenty-one".