1131212202121 has 16 divisors (see below), whose sum is σ = 1147001241600. Its totient is φ = 1115461093968.

The previous prime is 1131212202119. The next prime is 1131212202149. The reversal of 1131212202121 is 1212022121311.

It is a cyclic number.

It is not a de Polignac number, because 1131212202121 - 2¹ = 1131212202119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131212202521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317843740 + ... + 317847298.

It is an arithmetic number, because the mean of its divisors is an integer number (71687577600).

Almost surely, 2^{1131212202121} is an apocalyptic number.

It is an amenable number.

1131212202121 is a deficient number, since it is larger than the sum of its proper divisors (15789039479).

1131212202121 is a wasteful number, since it uses less digits than its factorization.

1131212202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1131212202121 its reverse (1212022121311), we get a palindrome (2343234323432).

The spelling of 1131212202121 in words is "one trillion, one hundred thirty-one billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".