1212022402121 has 2 divisors, whose sum is σ = 1212022402122. Its totient is φ = 1212022402120.

The previous prime is 1212022402099. The next prime is 1212022402169. The reversal of 1212022402121 is 1212042202121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772368534025 + 439653868096 = 878845^2 + 663064^2 .

It is an emirp because it is prime and its reverse (1212042202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212022402121 - 2¹⁴ = 1212022385737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212022402093 and 1212022402102.

It is not a weakly prime, because it can be changed into another prime (1212022402181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606011201060 + 606011201061.

It is an arithmetic number, because the mean of its divisors is an integer number (606011201061).

Almost surely, 2^{1212022402121} is an apocalyptic number.

It is an amenable number.

1212022402121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212022402121 is an equidigital number, since it uses as much as digits as its factorization.

1212022402121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1212022402121 its reverse (1212042202121), we get a palindrome (2424064604242).

The spelling of 1212022402121 in words is "one trillion, two hundred twelve billion, twenty-two million, four hundred two thousand, one hundred twenty-one".