42121230033431 has 16 divisors (see below), whose sum is σ = 43230164023200. Its totient is φ = 41025498928128.

The previous prime is 42121230033413. The next prime is 42121230033433. The reversal of 42121230033431 is 13433003212124.

It is a cyclic number.

It is not a de Polignac number, because 42121230033431 - 2⁶ = 42121230033367 is a prime.

It is a super-2 number, since 2×42121230033431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42121230033394 and 42121230033403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121230033433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147725555 + ... + 148010411.

It is an arithmetic number, because the mean of its divisors is an integer number (2701885251450).

Almost surely, 2^{42121230033431} is an apocalyptic number.

42121230033431 is a deficient number, since it is larger than the sum of its proper divisors (1108933989769).

42121230033431 is a wasteful number, since it uses less digits than its factorization.

42121230033431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308018.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 42121230033431 its reverse (13433003212124), we get a palindrome (55554233245555).

The spelling of 42121230033431 in words is "forty-two trillion, one hundred twenty-one billion, two hundred thirty million, thirty-three thousand, four hundred thirty-one".