1021531098 has 16 divisors (see below), whose sum is σ = 2334928320. Its totient is φ = 291866016.

The previous prime is 1021531097. The next prime is 1021531109. The reversal of 1021531098 is 8901351201.

It is not an unprimeable number, because it can be changed into a prime (1021531097) 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, 12161043 + ... + 12161126.

It is an arithmetic number, because the mean of its divisors is an integer number (145933020).

Almost surely, 2^1021531098 is an apocalyptic number.

1021531098 is an abundant number, since it is smaller than the sum of its proper divisors (1313397222).

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

1021531098 is a wasteful number, since it uses less digits than its factorization.

1021531098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24322181.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1021531098 is about 31961.4001257767. The cubic root of 1021531098 is about 1007.1261303078.

Adding to 1021531098 its reverse (8901351201), we get a palindrome (9922882299).

The spelling of 1021531098 in words is "one billion, twenty-one million, five hundred thirty-one thousand, ninety-eight".