121017890153 has 2 divisors, whose sum is σ = 121017890154. Its totient is φ = 121017890152.

The previous prime is 121017890107. The next prime is 121017890209. The reversal of 121017890153 is 351098710121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108449686489 + 12568203664 = 329317^2 + 112108^2 .

It is an emirp because it is prime and its reverse (351098710121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121017890153 - 2¹⁰ = 121017889129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121017892153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60508945076 + 60508945077.

It is an arithmetic number, because the mean of its divisors is an integer number (60508945077).

Almost surely, 2^121017890153 is an apocalyptic number.

It is an amenable number.

121017890153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121017890153 is an equidigital number, since it uses as much as digits as its factorization.

121017890153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 121017890153 in words is "one hundred twenty-one billion, seventeen million, eight hundred ninety thousand, one hundred fifty-three".