121011001011 has 6 divisors (see below), whose sum is σ = 174793668140. Its totient is φ = 80674000668.

The previous prime is 121011000959. The next prime is 121011001057. The reversal of 121011001011 is 110100110121.

It is not a de Polignac number, because 121011001011 - 2⁷ = 121011000883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13445666779 = 121011001011 / (1 + 2 + 1 + 0 + 1 + 1 + 0 + 0 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011000984 and 121011001002.

It is not an unprimeable number, because it can be changed into a prime (121011001411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6722833381 + ... + 6722833398.

Almost surely, 2^121011001011 is an apocalyptic number.

121011001011 is a deficient number, since it is larger than the sum of its proper divisors (53782667129).

121011001011 is a wasteful number, since it uses less digits than its factorization.

121011001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445666785 (or 13445666782 counting only the distinct ones).

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

Adding to 121011001011 its reverse (110100110121), we get a palindrome (231111111132).

The spelling of 121011001011 in words is "one hundred twenty-one billion, eleven million, one thousand, eleven".