21301121054 has 16 divisors (see below), whose sum is σ = 33515458560. Its totient is φ = 10134150840.

The previous prime is 21301121053. The next prime is 21301121069. The reversal of 21301121054 is 45012110312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301121053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203434 + ... + 1221005.

It is an arithmetic number, because the mean of its divisors is an integer number (2094716160).

Almost surely, 2^21301121054 is an apocalyptic number.

21301121054 is a deficient number, since it is larger than the sum of its proper divisors (12214337506).

21301121054 is a wasteful number, since it uses less digits than its factorization.

21301121054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424655.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21301121054 its reverse (45012110312), we get a palindrome (66313231366).

The spelling of 21301121054 in words is "twenty-one billion, three hundred one million, one hundred twenty-one thousand, fifty-four".