102000021201 has 40 divisors (see below), whose sum is σ = 164247658344. Its totient is φ = 62709396480.

The previous prime is 102000021191. The next prime is 102000021239. The reversal of 102000021201 is 102120000201.

It can be written as a sum of positive squares in 4 ways, for example, as 7613435025 + 94386586176 = 87255^2 + 307224^2 .

It is not a de Polignac number, because 102000021201 - 2¹¹ = 102000019153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (102000021001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1071585 + ... + 1162881.

Almost surely, 2^102000021201 is an apocalyptic number.

It is an amenable number.

102000021201 is a deficient number, since it is larger than the sum of its proper divisors (62247637143).

102000021201 is a wasteful number, since it uses less digits than its factorization.

102000021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92383 (or 92374 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102000021201 its reverse (102120000201), we get a palindrome (204120021402).

The spelling of 102000021201 in words is "one hundred two billion, twenty-one thousand, two hundred one".