121100101011 has 24 divisors (see below), whose sum is σ = 180794345264. Its totient is φ = 78051055680.

The previous prime is 121100100997. The next prime is 121100101019. The reversal of 121100101011 is 110101001121.

It is not a de Polignac number, because 121100101011 - 2¹³ = 121100092819 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100100984 and 121100101002.

It is not an unprimeable number, because it can be changed into a prime (121100101019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1105885 + ... + 1210446.

Almost surely, 2^121100101011 is an apocalyptic number.

121100101011 is a deficient number, since it is larger than the sum of its proper divisors (59694244253).

121100101011 is a wasteful number, since it uses less digits than its factorization.

121100101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316531 (or 2316528 counting only the distinct ones).

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

Adding to 121100101011 its reverse (110101001121), we get a palindrome (231201102132).

It can be divided in two parts, 121100 and 101011, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 121100101011 in words is "one hundred twenty-one billion, one hundred million, one hundred one thousand, eleven".