1212024202121 has 4 divisors (see below), whose sum is σ = 1212078407700. Its totient is φ = 1211969996544.

The previous prime is 1212024202073. The next prime is 1212024202127.

It is a happy number.

1212024202121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 569517752896 + 642506449225 = 754664^2 + 801565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212024202121 - 2⁶ = 1212024202057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212024202093 and 1212024202102.

It is not an unprimeable number, because it can be changed into a prime (1212024202127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27069236 + ... + 27113973.

It is an arithmetic number, because the mean of its divisors is an integer number (303019601925).

Almost surely, 2^{1212024202121} is an apocalyptic number.

It is an amenable number.

1212024202121 is a deficient number, since it is larger than the sum of its proper divisors (54205579).

1212024202121 is an equidigital number, since it uses as much as digits as its factorization.

1212024202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54205578.

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

The spelling of 1212024202121 in words is "one trillion, two hundred twelve billion, twenty-four million, two hundred two thousand, one hundred twenty-one".