102535321421 has 4 divisors (see below), whose sum is σ = 110422653852. Its totient is φ = 94647988992.

The previous prime is 102535321363. The next prime is 102535321433. The reversal of 102535321421 is 124123535201.

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 42906565321 + 59628756100 = 207139^2 + 244190^2 .

It is a cyclic number.

It is not a de Polignac number, because 102535321421 - 2¹⁰ = 102535320397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102535321451) 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, 3943666196 + ... + 3943666221.

It is an arithmetic number, because the mean of its divisors is an integer number (27605663463).

Almost surely, 2^102535321421 is an apocalyptic number.

It is an amenable number.

102535321421 is a deficient number, since it is larger than the sum of its proper divisors (7887332431).

102535321421 is an equidigital number, since it uses as much as digits as its factorization.

102535321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7887332430.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 102535321421 its reverse (124123535201), we get a palindrome (226658856622).

The spelling of 102535321421 in words is "one hundred two billion, five hundred thirty-five million, three hundred twenty-one thousand, four hundred twenty-one".