121220002220999 has 16 divisors (see below), whose sum is σ = 135742213791360. Its totient is φ = 107297661579360.

The previous prime is 121220002220921. The next prime is 121220002221077. The reversal of 121220002220999 is 999022200022121.

It is an interprime number because it is at equal distance from previous prime (121220002220921) and next prime (121220002221077).

It is a cyclic number.

It is not a de Polignac number, because 121220002220999 - 2¹⁶ = 121220002155463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220002220909) 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, 404075729 + ... + 404375610.

It is an arithmetic number, because the mean of its divisors is an integer number (8483888361960).

Almost surely, 2^{121220002220999} is an apocalyptic number.

121220002220999 is a deficient number, since it is larger than the sum of its proper divisors (14522211570361).

121220002220999 is a wasteful number, since it uses less digits than its factorization.

121220002220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808451710.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 121220002220999 in words is "one hundred twenty-one trillion, two hundred twenty billion, two million, two hundred twenty thousand, nine hundred ninety-nine".