121551117089 has 2 divisors, whose sum is σ = 121551117090. Its totient is φ = 121551117088.

The previous prime is 121551117011. The next prime is 121551117131. The reversal of 121551117089 is 980711155121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69113781025 + 52437336064 = 262895^2 + 228992^2 .

It is a cyclic number.

It is not a de Polignac number, because 121551117089 - 2³² = 117256149793 is a prime.

It is not a weakly prime, because it can be changed into another prime (121551117689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60775558544 + 60775558545.

It is an arithmetic number, because the mean of its divisors is an integer number (60775558545).

Almost surely, 2^121551117089 is an apocalyptic number.

It is an amenable number.

121551117089 is a deficient number, since it is larger than the sum of its proper divisors (1).

121551117089 is an equidigital number, since it uses as much as digits as its factorization.

121551117089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 41.

The spelling of 121551117089 in words is "one hundred twenty-one billion, five hundred fifty-one million, one hundred seventeen thousand, eighty-nine".