21221412310 has 16 divisors (see below), whose sum is σ = 43655476896. Its totient is φ = 7275912768.

The previous prime is 21221412281. The next prime is 21221412313. The reversal of 21221412310 is 1321412212.

21221412310 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21221412310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221412313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151581447 + ... + 151581586.

It is an arithmetic number, because the mean of its divisors is an integer number (2728467306).

Almost surely, 2^21221412310 is an apocalyptic number.

21221412310 is an abundant number, since it is smaller than the sum of its proper divisors (22434064586).

21221412310 is a wasteful number, since it uses less digits than its factorization.

21221412310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303163047.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21221412310 its reverse (1321412212), we get a palindrome (22542824522).

The spelling of 21221412310 in words is "twenty-one billion, two hundred twenty-one million, four hundred twelve thousand, three hundred ten".