21113011145153 has 4 divisors (see below), whose sum is σ = 22030968151488. Its totient is φ = 20195054138820.

The previous prime is 21113011145143. The next prime is 21113011145167. The reversal of 21113011145153 is 35154111031112.

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 21113011145153 - 2⁴ = 21113011145137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113011145143) 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, 458978503133 + ... + 458978503178.

It is an arithmetic number, because the mean of its divisors is an integer number (5507742037872).

Almost surely, 2^{21113011145153} is an apocalyptic number.

21113011145153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21113011145153 is a deficient number, since it is larger than the sum of its proper divisors (917957006335).

21113011145153 is an equidigital number, since it uses as much as digits as its factorization.

21113011145153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917957006334.

The product of its (nonzero) digits is 1800, while the sum is 29.

Adding to 21113011145153 its reverse (35154111031112), we get a palindrome (56267122176265).

The spelling of 21113011145153 in words is "twenty-one trillion, one hundred thirteen billion, eleven million, one hundred forty-five thousand, one hundred fifty-three".