1021230242 has 4 divisors (see below), whose sum is σ = 1531845366. Its totient is φ = 510615120.

The previous prime is 1021230227. The next prime is 1021230247. The reversal of 1021230242 is 2420321201.

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

It can be written as a sum of positive squares in only one way, i.e., 568774801 + 452455441 = 23849^2 + 21271^2 .

It is a super-2 number, since 2×1021230242² = 2085822414350757128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021230242.

It is not an unprimeable number, because it can be changed into a prime (1021230247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255307559 + ... + 255307562.

Almost surely, 2^1021230242 is an apocalyptic number.

1021230242 is a deficient number, since it is larger than the sum of its proper divisors (510615124).

1021230242 is an equidigital number, since it uses as much as digits as its factorization.

1021230242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510615123.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1021230242 is about 31956.6932269282. The cubic root of 1021230242 is about 1007.0272494251.

Adding to 1021230242 its reverse (2420321201), we get a palindrome (3441551443).

The spelling of 1021230242 in words is "one billion, twenty-one million, two hundred thirty thousand, two hundred forty-two".