1802121001 has 8 divisors (see below), whose sum is σ = 1931298624. Its totient is φ = 1677178800.

The previous prime is 1802120981. The next prime is 1802121017. The reversal of 1802121001 is 1001212081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1802121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1802121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1057975 + ... + 1059676.

It is an arithmetic number, because the mean of its divisors is an integer number (241412328).

Almost surely, 2^1802121001 is an apocalyptic number.

It is an amenable number.

1802121001 is a deficient number, since it is larger than the sum of its proper divisors (129177623).

1802121001 is a wasteful number, since it uses less digits than its factorization.

1802121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117711.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1802121001 is about 42451.3957485499. The cubic root of 1802121001 is about 1216.9180025537.

Adding to 1802121001 its reverse (1001212081), we get a palindrome (2803333082).

The spelling of 1802121001 in words is "one billion, eight hundred two million, one hundred twenty-one thousand, one".