1021130420 has 24 divisors (see below), whose sum is σ = 2196677448. Its totient is φ = 398489600.

The previous prime is 1021130401. The next prime is 1021130431. The reversal of 1021130420 is 240311201.

It can be written as a sum of positive squares in 4 ways, for example, as 37429924 + 983700496 = 6118^2 + 31364^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021130395 and 1021130404.

It is a congruent number.

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, 621821 + ... + 623460.

It is an arithmetic number, because the mean of its divisors is an integer number (91528227).

Almost surely, 2^1021130420 is an apocalyptic number.

1021130420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021130420 is an abundant number, since it is smaller than the sum of its proper divisors (1175547028).

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

1021130420 is a wasteful number, since it uses less digits than its factorization.

1021130420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245331 (or 1245329 counting only the distinct ones).

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

The square root of 1021130420 is about 31955.1313563252. The cubic root of 1021130420 is about 1006.9944371217.

Adding to 1021130420 its reverse (240311201), we get a palindrome (1261441621).

The spelling of 1021130420 in words is "one billion, twenty-one million, one hundred thirty thousand, four hundred twenty".