1021401320 has 32 divisors (see below), whose sum is σ = 2325849120. Its totient is φ = 403636800.

The previous prime is 1021401313. The next prime is 1021401343. The reversal of 1021401320 is 231041201.

1021401320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1021401295 and 1021401304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150506 + ... + 157145.

It is an arithmetic number, because the mean of its divisors is an integer number (72682785).

Almost surely, 2^1021401320 is an apocalyptic number.

1021401320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021401320 is an abundant number, since it is smaller than the sum of its proper divisors (1304447800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021401320 is a wasteful number, since it uses less digits than its factorization.

1021401320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307745 (or 307741 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021401320 is about 31959.3698310840. The cubic root of 1021401320 is about 1007.0834791832.

Adding to 1021401320 its reverse (231041201), we get a palindrome (1252442521).

The spelling of 1021401320 in words is "one billion, twenty-one million, four hundred one thousand, three hundred twenty".