21053011141 has 4 divisors (see below), whose sum is σ = 21053772832. Its totient is φ = 21052249452.

The previous prime is 21053011139. The next prime is 21053011159. The reversal of 21053011141 is 14111035012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21053011141 - 2¹ = 21053011139 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 (21053011841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337761 + ... + 395206.

It is an arithmetic number, because the mean of its divisors is an integer number (5263443208).

Almost surely, 2^21053011141 is an apocalyptic number.

It is an amenable number.

21053011141 is a deficient number, since it is larger than the sum of its proper divisors (761691).

21053011141 is an equidigital number, since it uses as much as digits as its factorization.

21053011141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761690.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21053011141 its reverse (14111035012), we get a palindrome (35164046153).

The spelling of 21053011141 in words is "twenty-one billion, fifty-three million, eleven thousand, one hundred forty-one".