121202001 has 10 divisors (see below), whose sum is σ = 181054962. Its totient is φ = 80801280.

The previous prime is 121201981. The next prime is 121202017. The reversal of 121202001 is 100202121.

It can be written as a sum of positive squares in only one way, i.e., 120560400 + 641601 = 10980^2 + 801^2 .

It is not a de Polignac number, because 121202001 - 2⁹ = 121201489 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (121202101) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 748080 + ... + 748241.

Almost surely, 2^121202001 is an apocalyptic number.

It is an amenable number.

121202001 is a deficient number, since it is larger than the sum of its proper divisors (59852961).

121202001 is an equidigital number, since it uses as much as digits as its factorization.

121202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496333 (or 1496324 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 121202001 is about 11009.1780347127. The cubic root of 121202001 is about 494.8838294876.

Adding to 121202001 its reverse (100202121), we get a palindrome (221404122).

The spelling of 121202001 in words is "one hundred twenty-one million, two hundred two thousand, one".