20121421422 has 16 divisors (see below), whose sum is σ = 41630527440. Its totient is φ = 6475859712.

The previous prime is 20121421417. The next prime is 20121421427. The reversal of 20121421422 is 22412412102.

It is an interprime number because it is at equal distance from previous prime (20121421417) and next prime (20121421427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121421427) 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, 57820003 + ... + 57820350.

It is an arithmetic number, because the mean of its divisors is an integer number (2601907965).

Almost surely, 2^20121421422 is an apocalyptic number.

20121421422 is an abundant number, since it is smaller than the sum of its proper divisors (21509106018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121421422 is a wasteful number, since it uses less digits than its factorization.

20121421422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115640387.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20121421422 its reverse (22412412102), we get a palindrome (42533833524).

The spelling of 20121421422 in words is "twenty billion, one hundred twenty-one million, four hundred twenty-one thousand, four hundred twenty-two".