102020001121 has 8 divisors (see below), whose sum is σ = 103040458344. Its totient is φ = 100999747200.

The previous prime is 102020001077. The next prime is 102020001131. The reversal of 102020001121 is 121100020201.

It can be written as a sum of positive squares in 4 ways, for example, as 26153358400 + 75866642721 = 161720^2 + 275439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102020001121 - 2¹¹ = 102019999073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020001098 and 102020001107.

It is not an unprimeable number, because it can be changed into a prime (102020001131) 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, 1083691 + ... + 1174063.

It is an arithmetic number, because the mean of its divisors is an integer number (12880057293).

Almost surely, 2^102020001121 is an apocalyptic number.

It is an amenable number.

102020001121 is a deficient number, since it is larger than the sum of its proper divisors (1020457223).

102020001121 is a wasteful number, since it uses less digits than its factorization.

102020001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101651.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102020001121 its reverse (121100020201), we get a palindrome (223120021322).

The spelling of 102020001121 in words is "one hundred two billion, twenty million, one thousand, one hundred twenty-one".