801202120121 has 8 divisors (see below), whose sum is σ = 863753911944. Its totient is φ = 738781879680.

The previous prime is 801202120091. The next prime is 801202120129. The reversal of 801202120121 is 121021202108.

It can be written as a sum of positive squares in 4 ways, for example, as 115967491600 + 685234628521 = 340540^2 + 827789^2 .

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

It is not a de Polignac number, because 801202120121 - 2¹⁰ = 801202119097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 801202120093 and 801202120102.

It is not an unprimeable number, because it can be changed into a prime (801202120129) 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, 32875190 + ... + 32899551.

It is an arithmetic number, because the mean of its divisors is an integer number (107969238993).

Almost surely, 2^801202120121 is an apocalyptic number.

It is an amenable number.

801202120121 is a deficient number, since it is larger than the sum of its proper divisors (62551791823).

801202120121 is a wasteful number, since it uses less digits than its factorization.

801202120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65775691.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 801202120121 its reverse (121021202108), we get a palindrome (922223322229).

The spelling of 801202120121 in words is "eight hundred one billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".