1021201250 has 20 divisors (see below), whose sum is σ = 1914141966. Its totient is φ = 408480000.

The previous prime is 1021201243. The next prime is 1021201253. The reversal of 1021201250 is 521021201.

It can be written as a sum of positive squares in 5 ways, for example, as 12313081 + 1008888169 = 3509^2 + 31763^2 .

It is not an unprimeable number, because it can be changed into a prime (1021201253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 407231 + ... + 409730.

Almost surely, 2^1021201250 is an apocalyptic number.

1021201250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021201250 is a deficient number, since it is larger than the sum of its proper divisors (892940716).

1021201250 is an frugal number, since it uses more digits than its factorization.

1021201250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816983 (or 816968 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1021201250 is about 31956.2396098164. The cubic root of 1021201250 is about 1007.0177197392.

Adding to 1021201250 its reverse (521021201), we get a palindrome (1542222451).

The spelling of 1021201250 in words is "one billion, twenty-one million, two hundred one thousand, two hundred fifty".