102120020993 has 4 divisors (see below), whose sum is σ = 107494758960. Its totient is φ = 96745283028.

The previous prime is 102120020983. The next prime is 102120021011. The reversal of 102120020993 is 399020021201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399020021201 = 17 ⋅23471765953.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102120020993 is a prime.

It is a super-2 number, since 2×102120020993² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102120020963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687368955 + ... + 2687368992.

It is an arithmetic number, because the mean of its divisors is an integer number (26873689740).

Almost surely, 2^102120020993 is an apocalyptic number.

It is an amenable number.

102120020993 is a deficient number, since it is larger than the sum of its proper divisors (5374737967).

102120020993 is an equidigital number, since it uses as much as digits as its factorization.

102120020993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374737966.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 102120020993 in words is "one hundred two billion, one hundred twenty million, twenty thousand, nine hundred ninety-three".