102100021202101 has 4 divisors (see below), whose sum is σ = 109953868986892. Its totient is φ = 94246173417312.

The previous prime is 102100021201991. The next prime is 102100021202117. The reversal of 102100021202101 is 101202120001201.

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 49471177280625 + 52628843921476 = 7033575^2 + 7254574^2 .

It is a cyclic number.

It is not a de Polignac number, because 102100021202101 - 2¹⁷ = 102100021071029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 7853847784777 = 102100021202101 / (1 + 0 + 2 + 1 + 0 + 0 + 0 + 2 + 1 + 2 + 0 + 2 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100021202161) 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, 3926923892376 + ... + 3926923892401.

It is an arithmetic number, because the mean of its divisors is an integer number (27488467246723).

Almost surely, 2^{102100021202101} is an apocalyptic number.

It is an amenable number.

102100021202101 is a deficient number, since it is larger than the sum of its proper divisors (7853847784791).

102100021202101 is an equidigital number, since it uses as much as digits as its factorization.

102100021202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7853847784790.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102100021202101 its reverse (101202120001201), we get a palindrome (203302141203302).

The spelling of 102100021202101 in words is "one hundred two trillion, one hundred billion, twenty-one million, two hundred two thousand, one hundred one".