121211100011 has 12 divisors (see below), whose sum is σ = 124328592192. Its totient is φ = 118166189856.

The previous prime is 121211099983. The next prime is 121211100029. The reversal of 121211100011 is 110001112121.

It is not a de Polignac number, because 121211100011 - 2³⁴ = 104031230827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121211099965 and 121211100001.

It is not an unprimeable number, because it can be changed into a prime (121211100061) 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, 303590 + ... + 578436.

It is an arithmetic number, because the mean of its divisors is an integer number (10360716016).

Almost surely, 2^121211100011 is an apocalyptic number.

121211100011 is a deficient number, since it is larger than the sum of its proper divisors (3117492181).

121211100011 is an equidigital number, since it uses as much as digits as its factorization.

121211100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275110 (or 275057 counting only the distinct ones).

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

Adding to 121211100011 its reverse (110001112121), we get a palindrome (231212212132).

It can be divided in two parts, 12121 and 1100011, that multiplied together give a palindrome (13333233331).

The spelling of 121211100011 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred thousand, eleven".