1121001111111 has 32 divisors (see below), whose sum is σ = 1717087057920. Its totient is φ = 637241497344.

The previous prime is 1121001111107. The next prime is 1121001111179. The reversal of 1121001111111 is 1111111001211.

It is not a de Polignac number, because 1121001111111 - 2² = 1121001111107 is a prime.

It is a super-2 number, since 2×1121001111111² (a number of 25 digits) contains 22 as substring.

1121001111111 is a modest number, since divided by 1111111 gives 112100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001111011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5293125 + ... + 5500833.

It is an arithmetic number, because the mean of its divisors is an integer number (53658970560).

Almost surely, 2^{1121001111111} is an apocalyptic number.

1121001111111 is a deficient number, since it is larger than the sum of its proper divisors (596085946809).

1121001111111 is a wasteful number, since it uses less digits than its factorization.

1121001111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209055.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 1121001111111 its reverse (1111111001211), we get a palindrome (2232112112322).

The spelling of 1121001111111 in words is "one trillion, one hundred twenty-one billion, one million, one hundred eleven thousand, one hundred eleven".