102021008 has 20 divisors (see below), whose sum is σ = 206260608. Its totient is φ = 48792480.

The previous prime is 102021001. The next prime is 102021037. The reversal of 102021008 is 800120201.

It is a junction number, because it is equal to n+sod(n) for n = 102020983 and 102021001.

It is not an unprimeable number, because it can be changed into a prime (102021001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138248 + ... + 138983.

Almost surely, 2^102021008 is an apocalyptic number.

It is an amenable number.

102021008 is an abundant number, since it is smaller than the sum of its proper divisors (104239600).

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

102021008 is a wasteful number, since it uses less digits than its factorization.

102021008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277262 (or 277256 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 102021008 is about 10100.5449357943. The cubic root of 102021008 is about 467.2649478499.

Adding to 102021008 its reverse (800120201), we get a palindrome (902141209).

The spelling of 102021008 in words is "one hundred two million, twenty-one thousand, eight".