102121220110201 has 4 divisors (see below), whose sum is σ = 102214652151652. Its totient is φ = 102027788068752.

The previous prime is 102121220110183. The next prime is 102121220110213. The reversal of 102121220110201 is 102011022121201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80529176178025 + 21592043932176 = 8973805^2 + 4646724^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121220110201 - 2¹¹ = 102121220108153 is a prime.

It is a super-2 number, since 2×102121220110201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121220110271) 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, 46716019086 + ... + 46716021271.

It is an arithmetic number, because the mean of its divisors is an integer number (25553663037913).

Almost surely, 2^{102121220110201} is an apocalyptic number.

It is an amenable number.

102121220110201 is a deficient number, since it is larger than the sum of its proper divisors (93432041451).

102121220110201 is an equidigital number, since it uses as much as digits as its factorization.

102121220110201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93432041450.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102121220110201 its reverse (102011022121201), we get a palindrome (204132242231402).

The spelling of 102121220110201 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, two hundred one".