10031121111111 has 4 divisors (see below), whose sum is σ = 13374828148152. Its totient is φ = 6687414074072.

The previous prime is 10031121111107. The next prime is 10031121111139. The reversal of 10031121111111 is 11111112113001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10031121111111 - 2² = 10031121111107 is a prime.

10031121111111 is a modest number, since divided by 1111111 gives 1003112 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031121111311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671853518516 + ... + 1671853518521.

It is an arithmetic number, because the mean of its divisors is an integer number (3343707037038).

Almost surely, 2^{10031121111111} is an apocalyptic number.

10031121111111 is a deficient number, since it is larger than the sum of its proper divisors (3343707037041).

10031121111111 is an equidigital number, since it uses as much as digits as its factorization.

10031121111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343707037040.

The product of its (nonzero) digits is 6, while the sum is 15.

Adding to 10031121111111 its reverse (11111112113001), we get a palindrome (21142233224112).

The spelling of 10031121111111 in words is "ten trillion, thirty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred eleven".