121220111220998 has 4 divisors (see below), whose sum is σ = 181830166831500. Its totient is φ = 60610055610498.

The previous prime is 121220111220983. The next prime is 121220111221007. The reversal of 121220111220998 is 899022111022121.

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

It is a super-2 number, since 2×121220111220998² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305027805248 + ... + 30305027805251.

It is an arithmetic number, because the mean of its divisors is an integer number (45457541707875).

Almost surely, 2^{121220111220998} is an apocalyptic number.

121220111220998 is a deficient number, since it is larger than the sum of its proper divisors (60610055610502).

121220111220998 is an equidigital number, since it uses as much as digits as its factorization.

121220111220998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610055610501.

The product of its (nonzero) digits is 20736, while the sum is 41.

The spelling of 121220111220998 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, nine hundred ninety-eight".