21123431034102 has 12 divisors (see below), whose sum is σ = 45767433907260. Its totient is φ = 7041143678028.

The previous prime is 21123431034073. The next prime is 21123431034107. The reversal of 21123431034102 is 20143013432112.

21123431034102 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 3 + 4 + 310 + 341 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123431034107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586761973152 + ... + 586761973187.

It is an arithmetic number, because the mean of its divisors is an integer number (3813952825605).

Almost surely, 2^{21123431034102} is an apocalyptic number.

21123431034102 is an abundant number, since it is smaller than the sum of its proper divisors (24644002873158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21123431034102 is a wasteful number, since it uses less digits than its factorization.

21123431034102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173523946347 (or 1173523946344 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21123431034102 its reverse (20143013432112), we get a palindrome (41266444466214).

The spelling of 21123431034102 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred thirty-one million, thirty-four thousand, one hundred two".