121000020011 has 16 divisors (see below), whose sum is σ = 130779700128. Its totient is φ = 111288038400.

The previous prime is 121000019971. The next prime is 121000020019. The reversal of 121000020011 is 110020000121.

It is a cyclic number.

It is not a de Polignac number, because 121000020011 - 2¹⁰ = 121000018987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121000020019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21073601 + ... + 21079341.

It is an arithmetic number, because the mean of its divisors is an integer number (8173731258).

Almost surely, 2^121000020011 is an apocalyptic number.

121000020011 is a deficient number, since it is larger than the sum of its proper divisors (9779680117).

121000020011 is a wasteful number, since it uses less digits than its factorization.

121000020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11342.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 121000020011 its reverse (110020000121), we get a palindrome (231020020132).

The spelling of 121000020011 in words is "one hundred twenty-one billion, twenty thousand, eleven".