121219947470387 has 2 divisors, whose sum is σ = 121219947470388. Its totient is φ = 121219947470386.

The previous prime is 121219947470383. The next prime is 121219947470437. The reversal of 121219947470387 is 783074749912121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121219947470387 - 2² = 121219947470383 is a prime.

It is not a weakly prime, because it can be changed into another prime (121219947470381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60609973735193 + 60609973735194.

It is an arithmetic number, because the mean of its divisors is an integer number (60609973735194).

Almost surely, 2^{121219947470387} is an apocalyptic number.

121219947470387 is a deficient number, since it is larger than the sum of its proper divisors (1).

121219947470387 is an equidigital number, since it uses as much as digits as its factorization.

121219947470387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42674688, while the sum is 65.

The spelling of 121219947470387 in words is "one hundred twenty-one trillion, two hundred nineteen billion, nine hundred forty-seven million, four hundred seventy thousand, three hundred eighty-seven".