102121019969 has 2 divisors, whose sum is σ = 102121019970. Its totient is φ = 102121019968.

The previous prime is 102121019953. The next prime is 102121020017. The reversal of 102121019969 is 969910121201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89947207744 + 12173812225 = 299912^2 + 110335^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121019969 - 2⁴ = 102121019953 is a prime.

It is a super-2 number, since 2×102121019969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102121049969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060509984 + 51060509985.

It is an arithmetic number, because the mean of its divisors is an integer number (51060509985).

Almost surely, 2^102121019969 is an apocalyptic number.

It is an amenable number.

102121019969 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121019969 is an equidigital number, since it uses as much as digits as its factorization.

102121019969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 102121019969 in words is "one hundred two billion, one hundred twenty-one million, nineteen thousand, nine hundred sixty-nine".