21060101500 has 48 divisors (see below), whose sum is σ = 48700884960. Its totient is φ = 7928505600.

The previous prime is 21060101497. The next prime is 21060101519. The reversal of 21060101500 is 510106012.

It is a happy number.

It is a congruent number.

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, 1230330 + ... + 1247329.

It is an arithmetic number, because the mean of its divisors is an integer number (1014601770).

Almost surely, 2^21060101500 is an apocalyptic number.

21060101500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21060101500 is an abundant number, since it is smaller than the sum of its proper divisors (27640783460).

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

21060101500 is a wasteful number, since it uses less digits than its factorization.

21060101500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477695 (or 2477683 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 21060101500 its reverse (510106012), we get a palindrome (21570207512).

The spelling of 21060101500 in words is "twenty-one billion, sixty million, one hundred one thousand, five hundred".