102121008019 has 2 divisors, whose sum is σ = 102121008020. Its totient is φ = 102121008018.

The previous prime is 102121007969. The next prime is 102121008071. The reversal of 102121008019 is 910800121201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102121008019 - 2²¹ = 102118910867 is a prime.

It is a super-2 number, since 2×102121008019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102121007984 and 102121008002.

It is not a weakly prime, because it can be changed into another prime (102121008089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060504009 + 51060504010.

It is an arithmetic number, because the mean of its divisors is an integer number (51060504010).

Almost surely, 2^102121008019 is an apocalyptic number.

102121008019 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121008019 is an equidigital number, since it uses as much as digits as its factorization.

102121008019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 102121008019 in words is "one hundred two billion, one hundred twenty-one million, eight thousand, nineteen".