100111021012221 has 4 divisors (see below), whose sum is σ = 133481361349632. Its totient is φ = 66740680674812.

The previous prime is 100111021012153. The next prime is 100111021012279. The reversal of 100111021012221 is 122210120111001.

It is a happy number.

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 100111021012221 - 2¹⁴ = 100111020995837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100111021012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111021012421) 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, 16685170168701 + ... + 16685170168706.

It is an arithmetic number, because the mean of its divisors is an integer number (33370340337408).

Almost surely, 2^{100111021012221} is an apocalyptic number.

It is an amenable number.

100111021012221 is a deficient number, since it is larger than the sum of its proper divisors (33370340337411).

100111021012221 is an equidigital number, since it uses as much as digits as its factorization.

100111021012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33370340337410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100111021012221 its reverse (122210120111001), we get a palindrome (222321141123222).

The spelling of 100111021012221 in words is "one hundred trillion, one hundred eleven billion, twenty-one million, twelve thousand, two hundred twenty-one".