21020142110 has 32 divisors (see below), whose sum is σ = 41600950272. Its totient is φ = 7583496480.

The previous prime is 21020142109. The next prime is 21020142127. The reversal of 21020142110 is 1124102012.

It is a happy number.

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, 738362 + ... + 766301.

It is an arithmetic number, because the mean of its divisors is an integer number (1300029696).

Almost surely, 2^21020142110 is an apocalyptic number.

21020142110 is a deficient number, since it is larger than the sum of its proper divisors (20580808162).

21020142110 is a wasteful number, since it uses less digits than its factorization.

21020142110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504808.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21020142110 its reverse (1124102012), we get a palindrome (22144244122).

The spelling of 21020142110 in words is "twenty-one billion, twenty million, one hundred forty-two thousand, one hundred ten".