102012220019 has 4 divisors (see below), whose sum is σ = 102013228296. Its totient is φ = 102011211744.

The previous prime is 102012219977. The next prime is 102012220099. The reversal of 102012220019 is 910022210201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 102012220019 - 2¹⁶ = 102012154483 is a prime.

It is a super-2 number, since 2×102012220019² (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 (102012220099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333014 + ... + 561179.

It is an arithmetic number, because the mean of its divisors is an integer number (25503307074).

Almost surely, 2^102012220019 is an apocalyptic number.

102012220019 is a deficient number, since it is larger than the sum of its proper divisors (1008277).

102012220019 is an equidigital number, since it uses as much as digits as its factorization.

102012220019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008276.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 102012220019 in words is "one hundred two billion, twelve million, two hundred twenty thousand, nineteen".