100212220022021 has 4 divisors (see below), whose sum is σ = 100720911494412. Its totient is φ = 99703528549632.

The previous prime is 100212220021993. The next prime is 100212220022029. The reversal of 100212220022021 is 120220022212001.

It is a happy number.

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 64798652157121 + 35413567864900 = 8049761^2 + 5950930^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212220022021 - 2⁴² = 95814173510917 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 (100212220022029) 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, 254345735900 + ... + 254345736293.

It is an arithmetic number, because the mean of its divisors is an integer number (25180227873603).

Almost surely, 2^{100212220022021} is an apocalyptic number.

It is an amenable number.

100212220022021 is a deficient number, since it is larger than the sum of its proper divisors (508691472391).

100212220022021 is an equidigital number, since it uses as much as digits as its factorization.

100212220022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508691472390.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 100212220022021 its reverse (120220022212001), we get a palindrome (220432242234022).

The spelling of 100212220022021 in words is "one hundred trillion, two hundred twelve billion, two hundred twenty million, twenty-two thousand, twenty-one".