21221113020133 has 16 divisors (see below), whose sum is σ = 23115817050480. Its totient is φ = 19365148647936.

The previous prime is 21221113020131. The next prime is 21221113020199. The reversal of 21221113020133 is 33102031112212.

It can be written as a sum of positive squares in 8 ways, for example, as 145971371844 + 21075141648289 = 382062^2 + 4590767^2 .

It is not a de Polignac number, because 21221113020133 - 2¹ = 21221113020131 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 (21221113020131) 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, 25987288 + ... + 26791441.

It is an arithmetic number, because the mean of its divisors is an integer number (1444738565655).

Almost surely, 2^{21221113020133} is an apocalyptic number.

It is an amenable number.

21221113020133 is a deficient number, since it is larger than the sum of its proper divisors (1894704030347).

21221113020133 is a wasteful number, since it uses less digits than its factorization.

21221113020133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52779096.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21221113020133 its reverse (33102031112212), we get a palindrome (54323144132345).

The spelling of 21221113020133 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred thirteen million, twenty thousand, one hundred thirty-three".