21221142110 has 32 divisors (see below), whose sum is σ = 43732541952. Its totient is φ = 7262883360.

The previous prime is 21221142091. The next prime is 21221142127. The reversal of 21221142110 is 1124112212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229826 + ... + 308645.

It is an arithmetic number, because the mean of its divisors is an integer number (1366641936).

Almost surely, 2^21221142110 is an apocalyptic number.

21221142110 is an abundant number, since it is smaller than the sum of its proper divisors (22511399842).

21221142110 is a wasteful number, since it uses less digits than its factorization.

21221142110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539048.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221142110 its reverse (1124112212), we get a palindrome (22345254322).

The spelling of 21221142110 in words is "twenty-one billion, two hundred twenty-one million, one hundred forty-two thousand, one hundred ten".