121001291 has 16 divisors (see below), whose sum is σ = 138166560. Its totient is φ = 105246720.

The previous prime is 121001281. The next prime is 121001297. The reversal of 121001291 is 192100121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8675 + ... + 17811.

It is an arithmetic number, because the mean of its divisors is an integer number (8635410).

Almost surely, 2^121001291 is an apocalyptic number.

121001291 is a deficient number, since it is larger than the sum of its proper divisors (17165269).

121001291 is a wasteful number, since it uses less digits than its factorization.

121001291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 121001291 is about 11000.0586816617. The cubic root of 121001291 is about 494.6105033817.

The spelling of 121001291 in words is "one hundred twenty-one million, one thousand, two hundred ninety-one".