121310001 has 32 divisors (see below), whose sum is σ = 183223040. Its totient is φ = 79315200.

The previous prime is 121309997. The next prime is 121310069. The reversal of 121310001 is 100013121.

It is not a de Polignac number, because 121310001 - 2² = 121309997 is a prime.

It is a super-2 number, since 2×121310001² = 29432232685240002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121310081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503241 + ... + 503481.

It is an arithmetic number, because the mean of its divisors is an integer number (5725720).

Almost surely, 2^121310001 is an apocalyptic number.

It is an amenable number.

121310001 is a deficient number, since it is larger than the sum of its proper divisors (61913039).

121310001 is a wasteful number, since it uses less digits than its factorization.

121310001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 121310001 is about 11014.0819408610. The cubic root of 121310001 is about 495.0307786188.

Adding to 121310001 its reverse (100013121), we get a palindrome (221323122).

The spelling of 121310001 in words is "one hundred twenty-one million, three hundred ten thousand, one".