102011212021 has 4 divisors (see below), whose sum is σ = 107380223200. Its totient is φ = 96642200844.

The previous prime is 102011211989. The next prime is 102011212031. The reversal of 102011212021 is 120212110201.

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.

It is a cyclic number.

It is not a de Polignac number, because 102011212021 - 2⁵ = 102011211989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102011211992 and 102011212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011212031) 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, 2684505561 + ... + 2684505598.

It is an arithmetic number, because the mean of its divisors is an integer number (26845055800).

Almost surely, 2^102011212021 is an apocalyptic number.

It is an amenable number.

102011212021 is a deficient number, since it is larger than the sum of its proper divisors (5369011179).

102011212021 is an equidigital number, since it uses as much as digits as its factorization.

102011212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369011178.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102011212021 its reverse (120212110201), we get a palindrome (222223322222).

The spelling of 102011212021 in words is "one hundred two billion, eleven million, two hundred twelve thousand, twenty-one".