21141121012554 has 16 divisors (see below), whose sum is σ = 42282323066592. Its totient is φ = 7047026830608.

The previous prime is 21141121012537. The next prime is 21141121012619. The reversal of 21141121012554 is 45521012114112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327057 + ... + 6510699.

It is an arithmetic number, because the mean of its divisors is an integer number (2642645191662).

Almost surely, 2^{21141121012554} is an apocalyptic number.

21141121012554 is an abundant number, since it is smaller than the sum of its proper divisors (21141202054038).

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

21141121012554 is a wasteful number, since it uses less digits than its factorization.

21141121012554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753461.

The product of its (nonzero) digits is 3200, while the sum is 30.

Adding to 21141121012554 its reverse (45521012114112), we get a palindrome (66662133126666).

The spelling of 21141121012554 in words is "twenty-one trillion, one hundred forty-one billion, one hundred twenty-one million, twelve thousand, five hundred fifty-four".