102355738421 has 2 divisors, whose sum is σ = 102355738422. Its totient is φ = 102355738420.

The previous prime is 102355738417. The next prime is 102355738423. The reversal of 102355738421 is 124837553201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69649015921 + 32706722500 = 263911^2 + 180850^2 .

It is a cyclic number.

It is not a de Polignac number, because 102355738421 - 2² = 102355738417 is a prime.

Together with 102355738423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102355738423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51177869210 + 51177869211.

It is an arithmetic number, because the mean of its divisors is an integer number (51177869211).

Almost surely, 2^102355738421 is an apocalyptic number.

It is an amenable number.

102355738421 is a deficient number, since it is larger than the sum of its proper divisors (1).

102355738421 is an equidigital number, since it uses as much as digits as its factorization.

102355738421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 102355738421 in words is "one hundred two billion, three hundred fifty-five million, seven hundred thirty-eight thousand, four hundred twenty-one".