21023551141 has 8 divisors (see below), whose sum is σ = 21350384640. Its totient is φ = 20699077872.

The previous prime is 21023551127. The next prime is 21023551147. The reversal of 21023551141 is 14115532012.

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 21023551141 - 2⁹ = 21023550629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023551147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572101 + ... + 607738.

It is an arithmetic number, because the mean of its divisors is an integer number (2668798080).

Almost surely, 2^21023551141 is an apocalyptic number.

It is an amenable number.

21023551141 is a deficient number, since it is larger than the sum of its proper divisors (326833499).

21023551141 is a wasteful number, since it uses less digits than its factorization.

21023551141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180115.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 21023551141 in words is "twenty-one billion, twenty-three million, five hundred fifty-one thousand, one hundred forty-one".