121101001011 has 12 divisors (see below), whose sum is σ = 175655569440. Its totient is φ = 80396200080.

The previous prime is 121101000983. The next prime is 121101001031. The reversal of 121101001011 is 110100101121.

It is not a de Polignac number, because 121101001011 - 2¹⁵ = 121100968243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121101000984 and 121101001002.

It is not an unprimeable number, because it can be changed into a prime (121101001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28147780 + ... + 28152081.

It is an arithmetic number, because the mean of its divisors is an integer number (14637964120).

Almost surely, 2^121101001011 is an apocalyptic number.

121101001011 is a deficient number, since it is larger than the sum of its proper divisors (54554568429).

121101001011 is a wasteful number, since it uses less digits than its factorization.

121101001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56300106 (or 56300103 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 121101001011 its reverse (110100101121), we get a palindrome (231201102132).

The spelling of 121101001011 in words is "one hundred twenty-one billion, one hundred one million, one thousand, eleven".