21102122010 has 32 divisors (see below), whose sum is σ = 50649141312. Its totient is φ = 5626782720.

The previous prime is 21102121967. The next prime is 21102122021. The reversal of 21102122010 is 1022120112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544890 + ... + 582330.

It is an arithmetic number, because the mean of its divisors is an integer number (1582785666).

Almost surely, 2^21102122010 is an apocalyptic number.

21102122010 is an abundant number, since it is smaller than the sum of its proper divisors (29547019302).

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

21102122010 is a wasteful number, since it uses less digits than its factorization.

21102122010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56238.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21102122010 its reverse (1022120112), we get a palindrome (22124242122).

The spelling of 21102122010 in words is "twenty-one billion, one hundred two million, one hundred twenty-two thousand, ten".