21121303031131 has 8 divisors (see below), whose sum is σ = 21327396985440. Its totient is φ = 20915228937792.

The previous prime is 21121303031123. The next prime is 21121303031149. The reversal of 21121303031131 is 13113030312112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21121303031131 - 2³ = 21121303031123 is a prime.

It is a super-2 number, since 2×21121303031131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121303031161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2823466 + ... + 7086223.

It is an arithmetic number, because the mean of its divisors is an integer number (2665924623180).

Almost surely, 2^{21121303031131} is an apocalyptic number.

21121303031131 is a deficient number, since it is larger than the sum of its proper divisors (206093954309).

21121303031131 is a wasteful number, since it uses less digits than its factorization.

21121303031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9930485.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21121303031131 its reverse (13113030312112), we get a palindrome (34234333343243).

The spelling of 21121303031131 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred three million, thirty-one thousand, one hundred thirty-one".