121210001 has 8 divisors (see below), whose sum is σ = 132442464. Its totient is φ = 110013120.

The previous prime is 121209967. The next prime is 121210007. The reversal of 121210001 is 100012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121210001 - 2¹⁴ = 121193617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121210007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496 + ... + 15641.

It is an arithmetic number, because the mean of its divisors is an integer number (16555308).

Almost surely, 2^121210001 is an apocalyptic number.

121210001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121210001 is a deficient number, since it is larger than the sum of its proper divisors (11232463).

121210001 is a wasteful number, since it uses less digits than its factorization.

121210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17791.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121210001 is about 11009.5413619278. The cubic root of 121210001 is about 494.8947176014.

Adding to 121210001 its reverse (100012121), we get a palindrome (221222122).

The spelling of 121210001 in words is "one hundred twenty-one million, two hundred ten thousand, one".