121011312287 has 2 divisors, whose sum is σ = 121011312288. Its totient is φ = 121011312286.

The previous prime is 121011312229. The next prime is 121011312319. The reversal of 121011312287 is 782213110121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121011312287 - 2¹⁸ = 121011050143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121011312887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505656143 + 60505656144.

It is an arithmetic number, because the mean of its divisors is an integer number (60505656144).

Almost surely, 2^121011312287 is an apocalyptic number.

121011312287 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011312287 is an equidigital number, since it uses as much as digits as its factorization.

121011312287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The spelling of 121011312287 in words is "one hundred twenty-one billion, eleven million, three hundred twelve thousand, two hundred eighty-seven".