21021010100011 has 8 divisors (see below), whose sum is σ = 22622417813664. Its totient is φ = 19460144353920.

The previous prime is 21021010100003. The next prime is 21021010100023. The reversal of 21021010100011 is 11000101012012.

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

It is not a de Polignac number, because 21021010100011 - 2³ = 21021010100003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021010110011) 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, 10135490815 + ... + 10135492888.

It is an arithmetic number, because the mean of its divisors is an integer number (2827802226708).

Almost surely, 2^{21021010100011} is an apocalyptic number.

21021010100011 is a deficient number, since it is larger than the sum of its proper divisors (1601407713653).

21021010100011 is a wasteful number, since it uses less digits than its factorization.

21021010100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20270983781.

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

Adding to 21021010100011 its reverse (11000101012012), we get a palindrome (32021111112023).

The spelling of 21021010100011 in words is "twenty-one trillion, twenty-one billion, ten million, one hundred thousand, eleven".