1021211097 has 8 divisors (see below), whose sum is σ = 1441709856. Its totient is φ = 640759872.

The previous prime is 1021211033. The next prime is 1021211129. The reversal of 1021211097 is 7901121201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021211097 - 2⁶ = 1021211033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021219097) 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, 10011823 + ... + 10011924.

It is an arithmetic number, because the mean of its divisors is an integer number (180213732).

Almost surely, 2^1021211097 is an apocalyptic number.

1021211097 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1021211097 is a deficient number, since it is larger than the sum of its proper divisors (420498759).

1021211097 is a wasteful number, since it uses less digits than its factorization.

1021211097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20023767.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 1021211097 is about 31956.3936795127. The cubic root of 1021211097 is about 1007.0209564736.

Adding to 1021211097 its reverse (7901121201), we get a palindrome (8922332298).

The spelling of 1021211097 in words is "one billion, twenty-one million, two hundred eleven thousand, ninety-seven".