21121303031130 has 32 divisors (see below), whose sum is σ = 50716511057664. Its totient is φ = 5629527054656.

The previous prime is 21121303031123. The next prime is 21121303031149. The reversal of 21121303031130 is 3113030312112.

It is a happy number.

It is a super-2 number, since 2×21121303031130² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121303031097 and 21121303031106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176215362 + ... + 176335181.

It is an arithmetic number, because the mean of its divisors is an integer number (1584890970552).

Almost surely, 2^{21121303031130} is an apocalyptic number.

21121303031130 is an abundant number, since it is smaller than the sum of its proper divisors (29595208026534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121303031130 is a wasteful number, since it uses less digits than its factorization.

21121303031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352552550.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21121303031130 its reverse (3113030312112), we get a palindrome (24234333343242).

The spelling of 21121303031130 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred three million, thirty-one thousand, one hundred thirty".