21401212620422 has 32 divisors (see below), whose sum is σ = 32459351491584. Its totient is φ = 10582033492800.

The previous prime is 21401212620377. The next prime is 21401212620427. The reversal of 21401212620422 is 22402621210412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401212620427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044817793 + ... + 1044838275.

It is an arithmetic number, because the mean of its divisors is an integer number (1014354734112).

Almost surely, 2^{21401212620422} is an apocalyptic number.

21401212620422 is a deficient number, since it is larger than the sum of its proper divisors (11058138871162).

21401212620422 is a wasteful number, since it uses less digits than its factorization.

21401212620422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34964.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21401212620422 its reverse (22402621210412), we get a palindrome (43803833830834).

The spelling of 21401212620422 in words is "twenty-one trillion, four hundred one billion, two hundred twelve million, six hundred twenty thousand, four hundred twenty-two".