121211001011 has 16 divisors (see below), whose sum is σ = 135990581760. Its totient is φ = 107360899200.

The previous prime is 121211000971. The next prime is 121211001031. The reversal of 121211001011 is 110100112121.

It is a cyclic number.

It is not a de Polignac number, because 121211001011 - 2⁶ = 121211000947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121211000983 and 121211001001.

It is not an unprimeable number, because it can be changed into a prime (121211001031) 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 15 ways as a sum of consecutive naturals, for example, 1193831 + ... + 1291376.

It is an arithmetic number, because the mean of its divisors is an integer number (8499411360).

Almost surely, 2^121211001011 is an apocalyptic number.

121211001011 is a deficient number, since it is larger than the sum of its proper divisors (14779580749).

121211001011 is a wasteful number, since it uses less digits than its factorization.

121211001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485394.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121211001011 its reverse (110100112121), we get a palindrome (231311113132).

The spelling of 121211001011 in words is "one hundred twenty-one billion, two hundred eleven million, one thousand, eleven".