21015101060 has 12 divisors (see below), whose sum is σ = 44131712268. Its totient is φ = 8406040416.

The previous prime is 21015101057. The next prime is 21015101101. The reversal of 21015101060 is 6010151012.

It can be written as a sum of positive squares in 2 ways, for example, as 10256017984 + 10759083076 = 101272^2 + 103726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525377507 + ... + 525377546.

It is an arithmetic number, because the mean of its divisors is an integer number (3677642689).

Almost surely, 2^21015101060 is an apocalyptic number.

21015101060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21015101060 is an abundant number, since it is smaller than the sum of its proper divisors (23116611208).

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

21015101060 is a wasteful number, since it uses less digits than its factorization.

21015101060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050755062 (or 1050755060 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 21015101060 its reverse (6010151012), we get a palindrome (27025252072).

The spelling of 21015101060 in words is "twenty-one billion, fifteen million, one hundred one thousand, sixty".