102021205 has 32 divisors (see below), whose sum is σ = 145410048. Its totient is φ = 67737600.

The previous prime is 102021197. The next prime is 102021251. The reversal of 102021205 is 502120201.

It is not a de Polignac number, because 102021205 - 2³ = 102021197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68620 + ... + 70090.

It is an arithmetic number, because the mean of its divisors is an integer number (4544064).

Almost surely, 2^102021205 is an apocalyptic number.

It is an amenable number.

102021205 is a deficient number, since it is larger than the sum of its proper divisors (43388843).

102021205 is a wasteful number, since it uses less digits than its factorization.

102021205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 102021205 is about 10100.5546877387. The cubic root of 102021205 is about 467.2652486086.

Adding to 102021205 its reverse (502120201), we get a palindrome (604141406).

The spelling of 102021205 in words is "one hundred two million, twenty-one thousand, two hundred five".