21054034121 has 8 divisors (see below), whose sum is σ = 22877049600. Its totient is φ = 19302509520.

The previous prime is 21054034103. The next prime is 21054034151. The reversal of 21054034121 is 12143045012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21054034121 - 2¹⁴ = 21054017737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21054034151) 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, 17872106 + ... + 17873283.

It is an arithmetic number, because the mean of its divisors is an integer number (2859631200).

Almost surely, 2^21054034121 is an apocalyptic number.

It is an amenable number.

21054034121 is a deficient number, since it is larger than the sum of its proper divisors (1823015479).

21054034121 is a wasteful number, since it uses less digits than its factorization.

21054034121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35745439.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21054034121 its reverse (12143045012), we get a palindrome (33197079133).

The spelling of 21054034121 in words is "twenty-one billion, fifty-four million, thirty-four thousand, one hundred twenty-one".