102021195 has 16 divisors (see below), whose sum is σ = 163406880. Its totient is φ = 54353664.

The previous prime is 102021149. The next prime is 102021197. The reversal of 102021195 is 591120201.

It is not a de Polignac number, because 102021195 - 2¹¹ = 102019147 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 13711 + ... + 19799.

It is an arithmetic number, because the mean of its divisors is an integer number (10212930).

Almost surely, 2^102021195 is an apocalyptic number.

102021195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102021195 is a deficient number, since it is larger than the sum of its proper divisors (61385685).

102021195 is a wasteful number, since it uses less digits than its factorization.

102021195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7214.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 102021195 is about 10100.5541927164. The cubic root of 102021195 is about 467.2652333417.

Adding to 102021195 its reverse (591120201), we get a palindrome (693141396).

It can be divided in two parts, 1020211 and 95, that added together give a triangular number (1020306 = T₁₄₂₈).

The spelling of 102021195 in words is "one hundred two million, twenty-one thousand, one hundred ninety-five".