102020001 has 4 divisors (see below), whose sum is σ = 136026672. Its totient is φ = 68013332.

The previous prime is 102019997. The next prime is 102020021. The reversal of 102020001 is 100020201.

It is a happy number.

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 102020001 - 2² = 102019997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102020021) 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, 17003331 + ... + 17003336.

It is an arithmetic number, because the mean of its divisors is an integer number (34006668).

Almost surely, 2^102020001 is an apocalyptic number.

It is an amenable number.

102020001 is a deficient number, since it is larger than the sum of its proper divisors (34006671).

102020001 is an equidigital number, since it uses as much as digits as its factorization.

102020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34006670.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 102020001 is about 10100.4950868757. The cubic root of 102020001 is about 467.2634104628.

Adding to 102020001 its reverse (100020201), we get a palindrome (202040202).

The spelling of 102020001 in words is "one hundred two million, twenty thousand, one".