21013020023011 has 8 divisors (see below), whose sum is σ = 21692144998400. Its totient is φ = 20333975398920.

The previous prime is 21013020022961. The next prime is 21013020023081. The reversal of 21013020023011 is 11032002031012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21013020023011 - 2⁹ = 21013020022499 is a prime.

It is a super-2 number, since 2×21013020023011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013020023081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19556121 + ... + 20602618.

It is an arithmetic number, because the mean of its divisors is an integer number (2711518124800).

Almost surely, 2^{21013020023011} is an apocalyptic number.

21013020023011 is a deficient number, since it is larger than the sum of its proper divisors (679124975389).

21013020023011 is a wasteful number, since it uses less digits than its factorization.

21013020023011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40175649.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21013020023011 its reverse (11032002031012), we get a palindrome (32045022054023).

The spelling of 21013020023011 in words is "twenty-one trillion, thirteen billion, twenty million, twenty-three thousand, eleven".