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BaseRepresentation
bin1001100011110010101110…
…01101100100000100001011
32202102120221221102010121122
410301321113031210010023
510223402033434320021
6112412532421225455
74266501540240341
oct461712715440413
982376857363548
1021021033120011
116774a741a7341
12243602556228b
13b96375cbc502
145295cdc79991
15266c12ddcbab
hex131e5736410b

21021033120011 has 4 divisors (see below), whose sum is σ = 21699130962624. Its totient is φ = 20342935277400.

The previous prime is 21021033120001. The next prime is 21021033120091. The reversal of 21021033120011 is 11002133012012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21021033120011 - 234 = 21003853250827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021033120001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339048921260 + ... + 339048921321.

It is an arithmetic number, because the mean of its divisors is an integer number (5424782740656).

Almost surely, 221021033120011 is an apocalyptic number.

21021033120011 is a deficient number, since it is larger than the sum of its proper divisors (678097842613).

21021033120011 is an equidigital number, since it uses as much as digits as its factorization.

21021033120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678097842612.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21021033120011 its reverse (11002133012012), we get a palindrome (32023166132023).

The spelling of 21021033120011 in words is "twenty-one trillion, twenty-one billion, thirty-three million, one hundred twenty thousand, eleven".

Divisors: 1 31 678097842581 21021033120011