21554114112 has 168 divisors, whose sum is σ = 63720146880. Its totient is φ = 6962672640.

The previous prime is 21554114089. The next prime is 21554114123. The reversal of 21554114112 is 21141145512.

21554114112 is a `hidden beast` number, since 2 + 1 + 5 + 541 + 1 + 4 + 112 = 666.

It is a super-3 number, since 3×21554114112³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2408398 + ... + 2417330.

Almost surely, 2^21554114112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21554114112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31860073440).

21554114112 is an abundant number, since it is smaller than the sum of its proper divisors (42166032768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21554114112 is a wasteful number, since it uses less digits than its factorization.

21554114112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081 (or 9068 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

Adding to 21554114112 its reverse (21141145512), we get a palindrome (42695259624).

The spelling of 21554114112 in words is "twenty-one billion, five hundred fifty-four million, one hundred fourteen thousand, one hundred twelve".