210121032113 has 2 divisors, whose sum is σ = 210121032114. Its totient is φ = 210121032112.

The previous prime is 210121032109. The next prime is 210121032139. The reversal of 210121032113 is 311230121012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154974494224 + 55146537889 = 393668^2 + 234833^2 .

It is a cyclic number.

It is not a de Polignac number, because 210121032113 - 2² = 210121032109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210121032091 and 210121032100.

It is not a weakly prime, because it can be changed into another prime (210121032103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060516056 + 105060516057.

It is an arithmetic number, because the mean of its divisors is an integer number (105060516057).

Almost surely, 2^210121032113 is an apocalyptic number.

It is an amenable number.

210121032113 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121032113 is an equidigital number, since it uses as much as digits as its factorization.

210121032113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 210121032113 its reverse (311230121012), we get a palindrome (521351153125).

The spelling of 210121032113 in words is "two hundred ten billion, one hundred twenty-one million, thirty-two thousand, one hundred thirteen".