21554340041222 has 32 divisors (see below), whose sum is σ = 36298149792480. Its totient is φ = 9539223828480.

The previous prime is 21554340041189. The next prime is 21554340041249. The reversal of 21554340041222 is 22214004345512.

It is a super-2 number, since 2×21554340041222² (a number of 27 digits) contains 22 as substring.

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, 121684679 + ... + 121861682.

It is an arithmetic number, because the mean of its divisors is an integer number (1134317181015).

Almost surely, 2^{21554340041222} is an apocalyptic number.

21554340041222 is a deficient number, since it is larger than the sum of its proper divisors (14743809751258).

21554340041222 is a wasteful number, since it uses less digits than its factorization.

21554340041222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243546536.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 21554340041222 its reverse (22214004345512), we get a palindrome (43768344386734).

The spelling of 21554340041222 in words is "twenty-one trillion, five hundred fifty-four billion, three hundred forty million, forty-one thousand, two hundred twenty-two".