1210112020121 has 2 divisors, whose sum is σ = 1210112020122. Its totient is φ = 1210112020120.

The previous prime is 1210112020037. The next prime is 1210112020207. The reversal of 1210112020121 is 1210202110121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931263600400 + 278848419721 = 965020^2 + 528061^2 .

It is an emirp because it is prime and its reverse (1210202110121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210112020121 is a prime.

It is a super-2 number, since 2×1210112020121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210112020096 and 1210112020105.

It is not a weakly prime, because it can be changed into another prime (1210112020021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605056010060 + 605056010061.

It is an arithmetic number, because the mean of its divisors is an integer number (605056010061).

Almost surely, 2^{1210112020121} is an apocalyptic number.

It is an amenable number.

1210112020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210112020121 is an equidigital number, since it uses as much as digits as its factorization.

1210112020121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1210112020121 its reverse (1210202110121), we get a palindrome (2420314130242).

The spelling of 1210112020121 in words is "one trillion, two hundred ten billion, one hundred twelve million, twenty thousand, one hundred twenty-one".