21311012010 has 32 divisors (see below), whose sum is σ = 51472213632. Its totient is φ = 5646738240.

The previous prime is 21311012003. The next prime is 21311012057. The reversal of 21311012010 is 1021011312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2257606 + ... + 2267025.

It is an arithmetic number, because the mean of its divisors is an integer number (1608506676).

Almost surely, 2^21311012010 is an apocalyptic number.

21311012010 is an abundant number, since it is smaller than the sum of its proper divisors (30161201622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311012010 is a wasteful number, since it uses less digits than its factorization.

21311012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524798.

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

Adding to 21311012010 its reverse (1021011312), we get a palindrome (22332023322).

The spelling of 21311012010 in words is "twenty-one billion, three hundred eleven million, twelve thousand, ten".