1021020130 has 32 divisors (see below), whose sum is σ = 2027492208. Its totient is φ = 367795200.

The previous prime is 1021020109. The next prime is 1021020149. The reversal of 1021020130 is 310201201.

It can be written as a sum of positive squares in 8 ways, for example, as 25921 + 1020994209 = 161^2 + 31953^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90451 + ... + 101110.

Almost surely, 2^1021020130 is an apocalyptic number.

1021020130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021020130 is a deficient number, since it is larger than the sum of its proper divisors (1006472078).

1021020130 is a wasteful number, since it uses less digits than its factorization.

1021020130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191622.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1021020130 is about 31953.4056087923. The cubic root of 1021020130 is about 1006.9581814150.

Adding to 1021020130 its reverse (310201201), we get a palindrome (1331221331).

The spelling of 1021020130 in words is "one billion, twenty-one million, twenty thousand, one hundred thirty".