1210121011873 has 2 divisors, whose sum is σ = 1210121011874. Its totient is φ = 1210121011872.

The previous prime is 1210121011867. The next prime is 1210121011877. The reversal of 1210121011873 is 3781101210121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1179519807249 + 30601204624 = 1086057^2 + 174932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210121011873 - 2¹³ = 1210121003681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210121011877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605060505936 + 605060505937.

It is an arithmetic number, because the mean of its divisors is an integer number (605060505937).

Almost surely, 2^{1210121011873} is an apocalyptic number.

It is an amenable number.

1210121011873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210121011873 is an equidigital number, since it uses as much as digits as its factorization.

1210121011873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 28.

Adding to 1210121011873 its reverse (3781101210121), we get a palindrome (4991222221994).

The spelling of 1210121011873 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, eleven thousand, eight hundred seventy-three".