121003109947 has 2 divisors, whose sum is σ = 121003109948. Its totient is φ = 121003109946.

The previous prime is 121003109939. The next prime is 121003109993. The reversal of 121003109947 is 749901300121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121003109947 - 2³ = 121003109939 is a prime.

It is not a weakly prime, because it can be changed into another prime (121003149947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501554973 + 60501554974.

It is an arithmetic number, because the mean of its divisors is an integer number (60501554974).

Almost surely, 2^121003109947 is an apocalyptic number.

121003109947 is a deficient number, since it is larger than the sum of its proper divisors (1).

121003109947 is an equidigital number, since it uses as much as digits as its factorization.

121003109947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 121003109947 in words is "one hundred twenty-one billion, three million, one hundred nine thousand, nine hundred forty-seven".