121231001 has 8 divisors (see below), whose sum is σ = 130327680. Its totient is φ = 112405968.

The previous prime is 121230979. The next prime is 121231003. The reversal of 121231001 is 100132121.

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 121231001 - 2¹⁴ = 121214617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231003) 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, 66986 + ... + 68771.

It is an arithmetic number, because the mean of its divisors is an integer number (16290960).

Almost surely, 2^121231001 is an apocalyptic number.

It is an amenable number.

121231001 is a deficient number, since it is larger than the sum of its proper divisors (9096679).

121231001 is a wasteful number, since it uses less digits than its factorization.

121231001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135823.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121231001 is about 11010.4950388255. The cubic root of 121231001 is about 494.9232966209.

Adding to 121231001 its reverse (100132121), we get a palindrome (221363122).

The spelling of 121231001 in words is "one hundred twenty-one million, two hundred thirty-one thousand, one".