1213121103011 has 8 divisors (see below), whose sum is σ = 1284515644464. Its totient is φ = 1141730392320.

The previous prime is 1213121103001. The next prime is 1213121103037. The reversal of 1213121103011 is 1103011213121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213121103011 - 2¹⁰ = 1213121101987 is a prime.

It is a super-2 number, since 2×1213121103011² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (1213121103001) 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, 292490 + ... + 1584863.

It is an arithmetic number, because the mean of its divisors is an integer number (160564455558).

Almost surely, 2^{1213121103011} is an apocalyptic number.

1213121103011 is a deficient number, since it is larger than the sum of its proper divisors (71394541453).

1213121103011 is a wasteful number, since it uses less digits than its factorization.

1213121103011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915381.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1213121103011 its reverse (1103011213121), we get a palindrome (2316132316132).

The spelling of 1213121103011 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, one hundred three thousand, eleven".