21103221133001 has 16 divisors (see below), whose sum is σ = 24708083823360. Its totient is φ = 17645954565120.

The previous prime is 21103221132991. The next prime is 21103221133067. The reversal of 21103221133001 is 10033112230112.

It is a happy number.

It is not a de Polignac number, because 21103221133001 - 2⁶ = 21103221132937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103221133201) 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, 1011620 + ... + 6574938.

It is an arithmetic number, because the mean of its divisors is an integer number (1544255238960).

Almost surely, 2^{21103221133001} is an apocalyptic number.

It is an amenable number.

21103221133001 is a deficient number, since it is larger than the sum of its proper divisors (3604862690359).

21103221133001 is a wasteful number, since it uses less digits than its factorization.

21103221133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576584.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21103221133001 its reverse (10033112230112), we get a palindrome (31136333363113).

The spelling of 21103221133001 in words is "twenty-one trillion, one hundred three billion, two hundred twenty-one million, one hundred thirty-three thousand, one".