1020421310215 has 4 divisors (see below), whose sum is σ = 1224505572264. Its totient is φ = 816337048168.

The previous prime is 1020421310197. The next prime is 1020421310243. The reversal of 1020421310215 is 5120131240201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020421310215 - 2¹⁹ = 1020420785927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102042131017 + ... + 102042131026.

It is an arithmetic number, because the mean of its divisors is an integer number (306126393066).

Almost surely, 2^{1020421310215} is an apocalyptic number.

1020421310215 is a deficient number, since it is larger than the sum of its proper divisors (204084262049).

1020421310215 is an equidigital number, since it uses as much as digits as its factorization.

1020421310215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204084262048.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 1020421310215 its reverse (5120131240201), we get a palindrome (6140552550416).

The spelling of 1020421310215 in words is "one trillion, twenty billion, four hundred twenty-one million, three hundred ten thousand, two hundred fifteen".