21123310132102 has 16 divisors (see below), whose sum is σ = 32422333660992. Its totient is φ = 10315873287720.

The previous prime is 21123310132061. The next prime is 21123310132121. The reversal of 21123310132102 is 20123101332112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3678853 + ... + 7468639.

It is an arithmetic number, because the mean of its divisors is an integer number (2026395853812).

Almost surely, 2^{21123310132102} is an apocalyptic number.

21123310132102 is a deficient number, since it is larger than the sum of its proper divisors (11299023528890).

21123310132102 is a wasteful number, since it uses less digits than its factorization.

21123310132102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854643.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21123310132102 its reverse (20123101332112), we get a palindrome (41246411464214).

The spelling of 21123310132102 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred ten million, one hundred thirty-two thousand, one hundred two".