1021230040 has 32 divisors (see below), whose sum is σ = 2299266000. Its totient is φ = 408225664.

The previous prime is 1021230037. The next prime is 1021230043. The reversal of 1021230040 is 400321201.

It is an interprime number because it is at equal distance from previous prime (1021230037) and next prime (1021230043).

It is a self number, because there is not a number n which added to its sum of digits gives 1021230040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021230043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60891 + ... + 75829.

Almost surely, 2^1021230040 is an apocalyptic number.

1021230040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021230040 is an abundant number, since it is smaller than the sum of its proper divisors (1278035960).

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

1021230040 is a wasteful number, since it uses less digits than its factorization.

1021230040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16659 (or 16655 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1021230040 is about 31956.6900664008. The cubic root of 1021230040 is about 1007.0271830282.

Adding to 1021230040 its reverse (400321201), we get a palindrome (1421551241).

The spelling of 1021230040 in words is "one billion, twenty-one million, two hundred thirty thousand, forty".