42212132121 has 4 divisors (see below), whose sum is σ = 56282842832. Its totient is φ = 28141421412.

The previous prime is 42212132107. The next prime is 42212132143. The reversal of 42212132121 is 12123121224.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42212132121 - 2⁵ = 42212132089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42212132101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7035355351 + ... + 7035355356.

It is an arithmetic number, because the mean of its divisors is an integer number (14070710708).

Almost surely, 2^42212132121 is an apocalyptic number.

It is an amenable number.

42212132121 is a deficient number, since it is larger than the sum of its proper divisors (14070710711).

42212132121 is a wasteful number, since it uses less digits than its factorization.

42212132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14070710710.

The product of its digits is 384, while the sum is 21.

Adding to 42212132121 its reverse (12123121224), we get a palindrome (54335253345).

The spelling of 42212132121 in words is "forty-two billion, two hundred twelve million, one hundred thirty-two thousand, one hundred twenty-one".