100212212220121 has 4 divisors (see below), whose sum is σ = 100212824251044. Its totient is φ = 100211600189200.

The previous prime is 100212212220119. The next prime is 100212212220143. The reversal of 100212212220121 is 121022212212001.

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 37190921646096 + 63021290574025 = 6098436^2 + 7938595^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212212220121 - 2¹ = 100212212220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100212216220121) 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, 305769790 + ... + 306097351.

It is an arithmetic number, because the mean of its divisors is an integer number (25053206062761).

Almost surely, 2^{100212212220121} is an apocalyptic number.

It is an amenable number.

100212212220121 is a deficient number, since it is larger than the sum of its proper divisors (612030923).

100212212220121 is an equidigital number, since it uses as much as digits as its factorization.

100212212220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612030922.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 100212212220121 its reverse (121022212212001), we get a palindrome (221234424432122).

The spelling of 100212212220121 in words is "one hundred trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-one".