21010111010 has 32 divisors (see below), whose sum is σ = 43255918080. Its totient is φ = 7197613632.

The previous prime is 21010110983. The next prime is 21010111013. The reversal of 21010111010 is 1011101012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21010111013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34730 + ... + 207909.

It is an arithmetic number, because the mean of its divisors is an integer number (1351747440).

Almost surely, 2^21010111010 is an apocalyptic number.

21010111010 is an abundant number, since it is smaller than the sum of its proper divisors (22245807070).

21010111010 is a wasteful number, since it uses less digits than its factorization.

21010111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243890.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21010111010 its reverse (1011101012), we get a palindrome (22021212022).

The spelling of 21010111010 in words is "twenty-one billion, ten million, one hundred eleven thousand, ten".