21111132303001 has 4 divisors (see below), whose sum is σ = 22735065557092. Its totient is φ = 19487199048912.

The previous prime is 21111132302993. The next prime is 21111132303043. The reversal of 21111132303001 is 10030323111112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10108908661401 + 11002223641600 = 3179451^2 + 3316960^2 .

It is a cyclic number.

It is not a de Polignac number, because 21111132303001 - 2³ = 21111132302993 is a prime.

It is a super-2 number, since 2×21111132303001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21111132303001.

It is not an unprimeable number, because it can be changed into a prime (21111132303061) 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, 811966627026 + ... + 811966627051.

It is an arithmetic number, because the mean of its divisors is an integer number (5683766389273).

Almost surely, 2^{21111132303001} is an apocalyptic number.

It is an amenable number.

21111132303001 is a deficient number, since it is larger than the sum of its proper divisors (1623933254091).

21111132303001 is a wasteful number, since it uses less digits than its factorization.

21111132303001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623933254090.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21111132303001 its reverse (10030323111112), we get a palindrome (31141455414113).

The spelling of 21111132303001 in words is "twenty-one trillion, one hundred eleven billion, one hundred thirty-two million, three hundred three thousand, one".