42211240121 has 4 divisors (see below), whose sum is σ = 43192896912. Its totient is φ = 41229583332.

The previous prime is 42211240111. The next prime is 42211240151. The reversal of 42211240121 is 12104211224.

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 a cyclic number.

It is not a de Polignac number, because 42211240121 - 2³⁴ = 25031370937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42211240093 and 42211240102.

It is not an unprimeable number, because it can be changed into a prime (42211240111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490828331 + ... + 490828416.

It is an arithmetic number, because the mean of its divisors is an integer number (10798224228).

Almost surely, 2^42211240121 is an apocalyptic number.

It is an amenable number.

42211240121 is a deficient number, since it is larger than the sum of its proper divisors (981656791).

42211240121 is an equidigital number, since it uses as much as digits as its factorization.

42211240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981656790.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 42211240121 its reverse (12104211224), we get a palindrome (54315451345).

The spelling of 42211240121 in words is "forty-two billion, two hundred eleven million, two hundred forty thousand, one hundred twenty-one".