21121021210130 has 64 divisors (see below), whose sum is σ = 40436300304000. Its totient is φ = 7920411936768.

The previous prime is 21121021210097. The next prime is 21121021210151. The reversal of 21121021210130 is 3101212012112.

It is a happy number.

It is a super-2 number, since 2×21121021210130² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21121021210099 and 21121021210108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18327416 + ... + 19445724.

It is an arithmetic number, because the mean of its divisors is an integer number (631817192250).

Almost surely, 2^{21121021210130} is an apocalyptic number.

21121021210130 is a deficient number, since it is larger than the sum of its proper divisors (19315279093870).

21121021210130 is a wasteful number, since it uses less digits than its factorization.

21121021210130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119371.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21121021210130 its reverse (3101212012112), we get a palindrome (24222233222242).

The spelling of 21121021210130 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-one million, two hundred ten thousand, one hundred thirty".