21227211060 has 96 divisors (see below), whose sum is σ = 67658637312. Its totient is φ = 4922248320.

The previous prime is 21227211023. The next prime is 21227211067. The reversal of 21227211060 is 6011272212.

It is a self number, because there is not a number n which added to its sum of digits gives 21227211060.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227211067) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 684004 + ... + 714363.

It is an arithmetic number, because the mean of its divisors is an integer number (704777472).

Almost surely, 2^21227211060 is an apocalyptic number.

21227211060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21227211060 is an abundant number, since it is smaller than the sum of its proper divisors (46431426252).

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

21227211060 is a wasteful number, since it uses less digits than its factorization.

21227211060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398413 (or 1398411 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 21227211060 its reverse (6011272212), we get a palindrome (27238483272).

It can be divided in two parts, 212 and 27211060, that added together give a palindrome (27211272).

The spelling of 21227211060 in words is "twenty-one billion, two hundred twenty-seven million, two hundred eleven thousand, sixty".