1211002202121 has 8 divisors (see below), whose sum is σ = 1635108458880. Its totient is φ = 797115373392.

The previous prime is 1211002202051. The next prime is 1211002202129. The reversal of 1211002202121 is 1212022001121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211002202121 - 2¹⁴ = 1211002185737 is a prime.

It is a super-2 number, since 2×1211002202121² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211002202121.

It is not an unprimeable number, because it can be changed into a prime (1211002202129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2554856730 + ... + 2554857203.

It is an arithmetic number, because the mean of its divisors is an integer number (204388557360).

Almost surely, 2^{1211002202121} is an apocalyptic number.

It is an amenable number.

1211002202121 is a deficient number, since it is larger than the sum of its proper divisors (424106256759).

1211002202121 is an equidigital number, since it uses as much as digits as its factorization.

1211002202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109714015.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211002202121 its reverse (1212022001121), we get a palindrome (2423024203242).

The spelling of 1211002202121 in words is "one trillion, two hundred eleven billion, two million, two hundred two thousand, one hundred twenty-one".