1211121231113 has 8 divisors (see below), whose sum is σ = 1274962560768. Its totient is φ = 1148211891904.

The previous prime is 1211121231107. The next prime is 1211121231121. The reversal of 1211121231113 is 3111321211121.

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 1211121231113 - 2⁸ = 1211121230857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211121231163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232994945 + ... + 233000142.

It is an arithmetic number, because the mean of its divisors is an integer number (159370320096).

Almost surely, 2^{1211121231113} is an apocalyptic number.

It is an amenable number.

1211121231113 is a deficient number, since it is larger than the sum of its proper divisors (63841329655).

1211121231113 is a wasteful number, since it uses less digits than its factorization.

1211121231113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465995223.

The product of its digits is 72, while the sum is 20.

Adding to 1211121231113 its reverse (3111321211121), we get a palindrome (4322442442234).

The spelling of 1211121231113 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred thirteen".