1020421340401 has 8 divisors (see below), whose sum is σ = 1031788384200. Its totient is φ = 1009071587328.

The previous prime is 1020421340369. The next prime is 1020421340447. The reversal of 1020421340401 is 1040431240201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 287163087376 + 733258253025 = 535876^2 + 856305^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1020421340401 - 2⁵ = 1020421340369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020421346401) 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, 4203976 + ... + 4440073.

It is an arithmetic number, because the mean of its divisors is an integer number (128973548025).

Almost surely, 2^{1020421340401} is an apocalyptic number.

It is an amenable number.

1020421340401 is a deficient number, since it is larger than the sum of its proper divisors (11367043799).

1020421340401 is an equidigital number, since it uses as much as digits as its factorization.

1020421340401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645363.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1020421340401 its reverse (1040431240201), we get a palindrome (2060852580602).

The spelling of 1020421340401 in words is "one trillion, twenty billion, four hundred twenty-one million, three hundred forty thousand, four hundred one".