121100002011 has 12 divisors (see below), whose sum is σ = 175138455960. Its totient is φ = 80633535840.

The previous prime is 121100001983. The next prime is 121100002091. The reversal of 121100002011 is 110200001121.

It is a happy number.

It is not a de Polignac number, because 121100002011 - 2⁹ = 121100001499 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 = 121100001984 and 121100002002.

It is not an unprimeable number, because it can be changed into a prime (121100002091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8308885 + ... + 8323446.

It is an arithmetic number, because the mean of its divisors is an integer number (14594871330).

Almost surely, 2^121100002011 is an apocalyptic number.

121100002011 is a deficient number, since it is larger than the sum of its proper divisors (54038453949).

121100002011 is a wasteful number, since it uses less digits than its factorization.

121100002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16633146 (or 16633143 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121100002011 its reverse (110200001121), we get a palindrome (231300003132).

The spelling of 121100002011 in words is "one hundred twenty-one billion, one hundred million, two thousand, eleven".