102020161 has 4 divisors (see below), whose sum is σ = 103010752. Its totient is φ = 101029572.

The previous prime is 102020153. The next prime is 102020183. The reversal of 102020161 is 161020201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102020161 - 2³ = 102020153 is a prime.

It is a super-2 number, since 2×102020161² = 20816226500931842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102020461) 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, 495141 + ... + 495346.

It is an arithmetic number, because the mean of its divisors is an integer number (25752688).

Almost surely, 2^102020161 is an apocalyptic number.

It is an amenable number.

102020161 is a deficient number, since it is larger than the sum of its proper divisors (990591).

102020161 is an equidigital number, since it uses as much as digits as its factorization.

102020161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990590.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102020161 is about 10100.5030072764. The cubic root of 102020161 is about 467.2636547355.

Adding to 102020161 its reverse (161020201), we get a palindrome (263040362).

The spelling of 102020161 in words is "one hundred two million, twenty thousand, one hundred sixty-one".