102121201010101 has 16 divisors (see below), whose sum is σ = 125699343606144. Its totient is φ = 80791663126464.

The previous prime is 102121201010089. The next prime is 102121201010131. The reversal of 102121201010101 is 101010102121201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102121201010101 - 2²¹ = 102121198912949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121201010131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51301831 + ... + 53255236.

It is an arithmetic number, because the mean of its divisors is an integer number (7856208975384).

Almost surely, 2^{102121201010101} is an apocalyptic number.

It is an amenable number.

102121201010101 is a deficient number, since it is larger than the sum of its proper divisors (23578142596043).

102121201010101 is a wasteful number, since it uses less digits than its factorization.

102121201010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104567820.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102121201010101 its reverse (101010102121201), we get a palindrome (203131303131302).

The spelling of 102121201010101 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred one million, ten thousand, one hundred one".