42122203021 has 4 divisors (see below), whose sum is σ = 42131126272. Its totient is φ = 42113279772.

The previous prime is 42122203009. The next prime is 42122203051. The reversal of 42122203021 is 12030222124.

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 42122203021 - 2²¹ = 42120105869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42122203021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42122203051) 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, 4454541 + ... + 4463986.

It is an arithmetic number, because the mean of its divisors is an integer number (10532781568).

Almost surely, 2^42122203021 is an apocalyptic number.

It is an amenable number.

42122203021 is a deficient number, since it is larger than the sum of its proper divisors (8923251).

42122203021 is an equidigital number, since it uses as much as digits as its factorization.

42122203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923250.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 42122203021 its reverse (12030222124), we get a palindrome (54152425145).

The spelling of 42122203021 in words is "forty-two billion, one hundred twenty-two million, two hundred three thousand, twenty-one".