102222121030021 has 4 divisors (see below), whose sum is σ = 107602232663200. Its totient is φ = 96842009396844.

The previous prime is 102222121030013. The next prime is 102222121030067. The reversal of 102222121030021 is 120030121222201.

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 102222121030021 - 2³ = 102222121030013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 5380111633159 = 102222121030021 / (1 + 0 + 2 + 2 + 2 + 2 + 1 + 2 + 1 + 0 + 3 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102222121030621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690055816561 + ... + 2690055816598.

It is an arithmetic number, because the mean of its divisors is an integer number (26900558165800).

Almost surely, 2^{102222121030021} is an apocalyptic number.

It is an amenable number.

102222121030021 is a deficient number, since it is larger than the sum of its proper divisors (5380111633179).

102222121030021 is an equidigital number, since it uses as much as digits as its factorization.

102222121030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5380111633178.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 102222121030021 its reverse (120030121222201), we get a palindrome (222252242252222).

The spelling of 102222121030021 in words is "one hundred two trillion, two hundred twenty-two billion, one hundred twenty-one million, thirty thousand, twenty-one".