21142202102 has 16 divisors (see below), whose sum is σ = 36318209280. Its totient is φ = 9042335208.

The previous prime is 21142202093. The next prime is 21142202129. The reversal of 21142202102 is 20120224112.

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 7 ways as a sum of consecutive naturals, for example, 1543652 + ... + 1557287.

It is an arithmetic number, because the mean of its divisors is an integer number (2269888080).

Almost surely, 2^21142202102 is an apocalyptic number.

21142202102 is a deficient number, since it is larger than the sum of its proper divisors (15176007178).

21142202102 is a wasteful number, since it uses less digits than its factorization.

21142202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101435.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21142202102 its reverse (20120224112), we get a palindrome (41262426214).

The spelling of 21142202102 in words is "twenty-one billion, one hundred forty-two million, two hundred two thousand, one hundred two".