121020200011 has 4 divisors (see below), whose sum is σ = 121022274312. Its totient is φ = 121018125712.

The previous prime is 121020199997. The next prime is 121020200023. The reversal of 121020200011 is 110002020121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121020200011 - 2⁹ = 121020199499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020200071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947026 + ... + 1067191.

It is an arithmetic number, because the mean of its divisors is an integer number (30255568578).

Almost surely, 2^121020200011 is an apocalyptic number.

121020200011 is a deficient number, since it is larger than the sum of its proper divisors (2074301).

121020200011 is an equidigital number, since it uses as much as digits as its factorization.

121020200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074300.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121020200011 its reverse (110002020121), we get a palindrome (231022220132).

The spelling of 121020200011 in words is "one hundred twenty-one billion, twenty million, two hundred thousand, eleven".