102021198 has 16 divisors (see below), whose sum is σ = 208788096. Its totient is φ = 33216120.

The previous prime is 102021197. The next prime is 102021251. The reversal of 102021198 is 891120201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021197) 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, 197458 + ... + 197973.

It is an arithmetic number, because the mean of its divisors is an integer number (13049256).

Almost surely, 2^102021198 is an apocalyptic number.

102021198 is an abundant number, since it is smaller than the sum of its proper divisors (106766898).

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

102021198 is a wasteful number, since it uses less digits than its factorization.

102021198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395479.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 102021198 is about 10100.5543412231. The cubic root of 102021198 is about 467.2652379218.

Adding to 102021198 its reverse (891120201), we get a palindrome (993141399).

The spelling of 102021198 in words is "one hundred two million, twenty-one thousand, one hundred ninety-eight".