21023242121429 has 8 divisors (see below), whose sum is σ = 21129630508800. Its totient is φ = 20916861174000.

The previous prime is 21023242121423. The next prime is 21023242121443. The reversal of 21023242121429 is 92412124232012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023242121429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023242121423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3850004 + ... + 7541154.

It is an arithmetic number, because the mean of its divisors is an integer number (2641203813600).

Almost surely, 2^{21023242121429} is an apocalyptic number.

It is an amenable number.

21023242121429 is a deficient number, since it is larger than the sum of its proper divisors (106388387371).

21023242121429 is a wasteful number, since it uses less digits than its factorization.

21023242121429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719971.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 21023242121429 in words is "twenty-one trillion, twenty-three billion, two hundred forty-two million, one hundred twenty-one thousand, four hundred twenty-nine".