20421431122 has 8 divisors (see below), whose sum is σ = 30740388336. Its totient is φ = 10174635012.

The previous prime is 20421431119. The next prime is 20421431171. The reversal of 20421431122 is 22113412402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20421431093 and 20421431102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18039568 + ... + 18040699.

It is an arithmetic number, because the mean of its divisors is an integer number (3842548542).

Almost surely, 2^20421431122 is an apocalyptic number.

20421431122 is a deficient number, since it is larger than the sum of its proper divisors (10318957214).

20421431122 is a wasteful number, since it uses less digits than its factorization.

20421431122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36080552.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20421431122 its reverse (22113412402), we get a palindrome (42534843524).

The spelling of 20421431122 in words is "twenty billion, four hundred twenty-one million, four hundred thirty-one thousand, one hundred twenty-two".