21554021001422 has 32 divisors (see below), whose sum is σ = 39834872280000. Its totient is φ = 8517686842368.

The previous prime is 21554021001419. The next prime is 21554021001433. The reversal of 21554021001422 is 22410012045512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63570797 + ... + 63908952.

It is an arithmetic number, because the mean of its divisors is an integer number (1244839758750).

Almost surely, 2^{21554021001422} is an apocalyptic number.

21554021001422 is a deficient number, since it is larger than the sum of its proper divisors (18280851278578).

21554021001422 is a wasteful number, since it uses less digits than its factorization.

21554021001422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127480700.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 21554021001422 its reverse (22410012045512), we get a palindrome (43964033046934).

The spelling of 21554021001422 in words is "twenty-one trillion, five hundred fifty-four billion, twenty-one million, one thousand, four hundred twenty-two".