1021212490 has 16 divisors (see below), whose sum is σ = 1838814048. Its totient is φ = 408344656.

The previous prime is 1021212481. The next prime is 1021212497. The reversal of 1021212490 is 942121201.

It is not an unprimeable number, because it can be changed into a prime (1021212497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16089 + ... + 47971.

It is an arithmetic number, because the mean of its divisors is an integer number (114925878).

Almost surely, 2^1021212490 is an apocalyptic number.

1021212490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021212490 is a deficient number, since it is larger than the sum of its proper divisors (817601558).

1021212490 is a wasteful number, since it uses less digits than its factorization.

1021212490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35093.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1021212490 is about 31956.4154748307. The cubic root of 1021212490 is about 1007.0214143546.

Adding to 1021212490 its reverse (942121201), we get a palindrome (1963333691).

The spelling of 1021212490 in words is "one billion, twenty-one million, two hundred twelve thousand, four hundred ninety".