402021001302001 has 4 divisors (see below), whose sum is σ = 407528138306212. Its totient is φ = 396513864297792.

The previous prime is 402021001301989. The next prime is 402021001302061. The reversal of 402021001302001 is 100203100120204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 241017893612001 + 161003107690000 = 15524751^2 + 12688700^2 .

It is a cyclic number.

It is not a de Polignac number, because 402021001302001 - 2³¹ = 402018853818353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402021001302061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2753568501996 + ... + 2753568502141.

It is an arithmetic number, because the mean of its divisors is an integer number (101882034576553).

Almost surely, 2^{402021001302001} is an apocalyptic number.

It is an amenable number.

402021001302001 is a deficient number, since it is larger than the sum of its proper divisors (5507137004211).

402021001302001 is an equidigital number, since it uses as much as digits as its factorization.

402021001302001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507137004210.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 402021001302001 its reverse (100203100120204), we get a palindrome (502224101422205).

The spelling of 402021001302001 in words is "four hundred two trillion, twenty-one billion, one million, three hundred two thousand, one".