100202202122221 has 4 divisors (see below), whose sum is σ = 100205876462944. Its totient is φ = 100198527781500.

The previous prime is 100202202122173. The next prime is 100202202122249. The reversal of 100202202122221 is 122221202202001.

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 100202202122221 - 2¹⁷ = 100202201991149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202202192221) 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, 1837129455 + ... + 1837183996.

It is an arithmetic number, because the mean of its divisors is an integer number (25051469115736).

Almost surely, 2^{100202202122221} is an apocalyptic number.

It is an amenable number.

100202202122221 is a deficient number, since it is larger than the sum of its proper divisors (3674340723).

100202202122221 is an equidigital number, since it uses as much as digits as its factorization.

100202202122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674340722.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 100202202122221 its reverse (122221202202001), we get a palindrome (222423404324222).

The spelling of 100202202122221 in words is "one hundred trillion, two hundred two billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".