21020010101011 has 8 divisors (see below), whose sum is σ = 21047309579744. Its totient is φ = 20992724769600.

The previous prime is 21020010101009. The next prime is 21020010101029. The reversal of 21020010101011 is 11010101002012.

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 21020010101011 - 2¹ = 21020010101009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020010101081) 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, 561690 + ... + 6508111.

It is an arithmetic number, because the mean of its divisors is an integer number (2630913697468).

Almost surely, 2^{21020010101011} is an apocalyptic number.

21020010101011 is a deficient number, since it is larger than the sum of its proper divisors (27299478733).

21020010101011 is a wasteful number, since it uses less digits than its factorization.

21020010101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073661.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21020010101011 its reverse (11010101002012), we get a palindrome (32030111103023).

The spelling of 21020010101011 in words is "twenty-one trillion, twenty billion, ten million, one hundred one thousand, eleven".