21010102101011 has 8 divisors (see below), whose sum is σ = 22250451345840. Its totient is φ = 19770248510208.

The previous prime is 21010102101007. The next prime is 21010102101059. The reversal of 21010102101011 is 11010120101012.

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 21010102101011 - 2² = 21010102101007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010102100983 and 21010102101001.

It is not an unprimeable number, because it can be changed into a prime (21010102101811) 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, 123826226 + ... + 123995783.

It is an arithmetic number, because the mean of its divisors is an integer number (2781306418230).

Almost surely, 2^{21010102101011} is an apocalyptic number.

21010102101011 is a deficient number, since it is larger than the sum of its proper divisors (1240349244829).

21010102101011 is a wasteful number, since it uses less digits than its factorization.

21010102101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247827013.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21010102101011 its reverse (11010120101012), we get a palindrome (32020222202023).

The spelling of 21010102101011 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred one thousand, eleven".