102121214281 has 2 divisors, whose sum is σ = 102121214282. Its totient is φ = 102121214280.

The previous prime is 102121214257. The next prime is 102121214291. The reversal of 102121214281 is 182412121201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94915751056 + 7205463225 = 308084^2 + 84885^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121214281 - 2²¹ = 102119117129 is a prime.

It is a super-2 number, since 2×102121214281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102121214291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060607140 + 51060607141.

It is an arithmetic number, because the mean of its divisors is an integer number (51060607141).

Almost surely, 2^102121214281 is an apocalyptic number.

It is an amenable number.

102121214281 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121214281 is an equidigital number, since it uses as much as digits as its factorization.

102121214281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 102121214281 its reverse (182412121201), we get a palindrome (284533335482).

The spelling of 102121214281 in words is "one hundred two billion, one hundred twenty-one million, two hundred fourteen thousand, two hundred eighty-one".