121220012011 has 8 divisors (see below), whose sum is σ = 139233324800. Its totient is φ = 103380741288.

The previous prime is 121220011999. The next prime is 121220012029. The reversal of 121220012011 is 110210022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220012011 - 2¹⁷ = 121219880939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220011982 and 121220012000.

It is not an unprimeable number, because it can be changed into a prime (121220012051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43509021 + ... + 43511806.

It is an arithmetic number, because the mean of its divisors is an integer number (17404165600).

Almost surely, 2^121220012011 is an apocalyptic number.

121220012011 is a deficient number, since it is larger than the sum of its proper divisors (18013312789).

121220012011 is an equidigital number, since it uses as much as digits as its factorization.

121220012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87021033.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121220012011 its reverse (110210022121), we get a palindrome (231430034132).

The spelling of 121220012011 in words is "one hundred twenty-one billion, two hundred twenty million, twelve thousand, eleven".