21103232221001 has 16 divisors (see below), whose sum is σ = 24458564793600. Its totient is φ = 17833064578560.

The previous prime is 21103232220989. The next prime is 21103232221021. The reversal of 21103232221001 is 10012223230112.

It is not a de Polignac number, because 21103232221001 - 2¹⁴ = 21103232204617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103232221021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13061825 + ... + 14588273.

It is an arithmetic number, because the mean of its divisors is an integer number (1528660299600).

Almost surely, 2^{21103232221001} is an apocalyptic number.

It is an amenable number.

21103232221001 is a deficient number, since it is larger than the sum of its proper divisors (3355332572599).

21103232221001 is a wasteful number, since it uses less digits than its factorization.

21103232221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554344.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21103232221001 its reverse (10012223230112), we get a palindrome (31115455451113).

The spelling of 21103232221001 in words is "twenty-one trillion, one hundred three billion, two hundred thirty-two million, two hundred twenty-one thousand, one".