121100001211 has 16 divisors (see below), whose sum is σ = 147388261824. Its totient is φ = 97129396224.

The previous prime is 121100001203. The next prime is 121100001221. The reversal of 121100001211 is 112100001121.

It is not a de Polignac number, because 121100001211 - 2³ = 121100001203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2920590 + ... + 2961763.

It is an arithmetic number, because the mean of its divisors is an integer number (9211766364).

Almost surely, 2^121100001211 is an apocalyptic number.

121100001211 is a deficient number, since it is larger than the sum of its proper divisors (26288260613).

121100001211 is a wasteful number, since it uses less digits than its factorization.

121100001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882550.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121100001211 its reverse (112100001121), we get a palindrome (233200002332).

It can be divided in two parts, 12110000 and 1211, that multiplied together give a square (14665210000 = 121100²).

The spelling of 121100001211 in words is "one hundred twenty-one billion, one hundred million, one thousand, two hundred eleven".