1212010222121 has 2 divisors, whose sum is σ = 1212010222122. Its totient is φ = 1212010222120.

The previous prime is 1212010222103. The next prime is 1212010222217. The reversal of 1212010222121 is 1212220102121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690818634025 + 521191588096 = 831155^2 + 721936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212010222121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212010222121.

It is not a weakly prime, because it can be changed into another prime (1212010222921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606005111060 + 606005111061.

It is an arithmetic number, because the mean of its divisors is an integer number (606005111061).

Almost surely, 2^{1212010222121} is an apocalyptic number.

It is an amenable number.

1212010222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212010222121 is an equidigital number, since it uses as much as digits as its factorization.

1212010222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212010222121 its reverse (1212220102121), we get a palindrome (2424230324242).

The spelling of 1212010222121 in words is "one trillion, two hundred twelve billion, ten million, two hundred twenty-two thousand, one hundred twenty-one".