21221010010011 has 12 divisors (see below), whose sum is σ = 32914219607592. Its totient is φ = 12126291434208.

The previous prime is 21221010010003. The next prime is 21221010010021. The reversal of 21221010010011 is 11001001012212.

It is not a de Polignac number, because 21221010010011 - 2³ = 21221010010003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221010010021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72180306010 + ... + 72180306303.

It is an arithmetic number, because the mean of its divisors is an integer number (2742851633966).

Almost surely, 2^{21221010010011} is an apocalyptic number.

21221010010011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21221010010011 is a deficient number, since it is larger than the sum of its proper divisors (11693209597581).

21221010010011 is a wasteful number, since it uses less digits than its factorization.

21221010010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144360612330 (or 144360612323 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21221010010011 its reverse (11001001012212), we get a palindrome (32222011022223).

The spelling of 21221010010011 in words is "twenty-one trillion, two hundred twenty-one billion, ten million, ten thousand, eleven".