100102012211221 has 4 divisors (see below), whose sum is σ = 100103216992812. Its totient is φ = 100100807429632.

The previous prime is 100102012211213. The next prime is 100102012211231. The reversal of 100102012211221 is 122112210201001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78720173808721 + 21381838402500 = 8872439^2 + 4624050^2 .

It is a cyclic number.

It is not a de Polignac number, because 100102012211221 - 2³ = 100102012211213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100102012211195 and 100102012211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102012211231) 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, 602266156 + ... + 602432341.

It is an arithmetic number, because the mean of its divisors is an integer number (25025804248203).

Almost surely, 2^{100102012211221} is an apocalyptic number.

It is an amenable number.

100102012211221 is a deficient number, since it is larger than the sum of its proper divisors (1204781591).

100102012211221 is an equidigital number, since it uses as much as digits as its factorization.

100102012211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204781590.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100102012211221 its reverse (122112210201001), we get a palindrome (222214222412222).

The spelling of 100102012211221 in words is "one hundred trillion, one hundred two billion, twelve million, two hundred eleven thousand, two hundred twenty-one".