20401421222 has 64 divisors (see below), whose sum is σ = 40569790464. Its totient is φ = 7470904320.

The previous prime is 20401421219. The next prime is 20401421239. The reversal of 20401421222 is 22212410402.

It is a junction number, because it is equal to n+sod(n) for n = 20401421194 and 20401421203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51158 + ... + 208374.

It is an arithmetic number, because the mean of its divisors is an integer number (633902976).

Almost surely, 2^20401421222 is an apocalyptic number.

20401421222 is a deficient number, since it is larger than the sum of its proper divisors (20168369242).

20401421222 is a wasteful number, since it uses less digits than its factorization.

20401421222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157293.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20401421222 its reverse (22212410402), we get a palindrome (42613831624).

The spelling of 20401421222 in words is "twenty billion, four hundred one million, four hundred twenty-one thousand, two hundred twenty-two".