1211121101011 has 8 divisors (see below), whose sum is σ = 1219452726800. Its totient is φ = 1202817960288.

The previous prime is 1211121100997. The next prime is 1211121101039. The reversal of 1211121101011 is 1101011211121.

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 1211121101011 - 2¹⁷ = 1211120969939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211121100982 and 1211121101000.

It is not an unprimeable number, because it can be changed into a prime (1211121101111) 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, 7035936 + ... + 7206013.

It is an arithmetic number, because the mean of its divisors is an integer number (152431590850).

Almost surely, 2^{1211121101011} is an apocalyptic number.

1211121101011 is a deficient number, since it is larger than the sum of its proper divisors (8331625789).

1211121101011 is a wasteful number, since it uses less digits than its factorization.

1211121101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242533.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1211121101011 its reverse (1101011211121), we get a palindrome (2312132312132).

The spelling of 1211121101011 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, eleven".