1021021008 has 40 divisors (see below), whose sum is σ = 3014443968. Its totient is φ = 291720192.

The previous prime is 1021021007. The next prime is 1021021013. The reversal of 1021021008 is 8001201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021021007) 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, 1519041 + ... + 1519712.

Almost surely, 2^1021021008 is an apocalyptic number.

It is an amenable number.

1021021008 is an abundant number, since it is smaller than the sum of its proper divisors (1993422960).

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

1021021008 is a wasteful number, since it uses less digits than its factorization.

1021021008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038771 (or 3038765 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1021021008 is about 31953.4193475440. The cubic root of 1021021008 is about 1006.9584700508.

Adding to 1021021008 its reverse (8001201201), we get a palindrome (9022222209).

The spelling of 1021021008 in words is "one billion, twenty-one million, twenty-one thousand, eight".