100121212220111 has 4 divisors (see below), whose sum is σ = 105390749705400. Its totient is φ = 94851674734824.

The previous prime is 100121212220101. The next prime is 100121212220153. The reversal of 100121212220111 is 111022212121001.

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

It is not a de Polignac number, because 100121212220111 - 2⁶ = 100121212220047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100121212220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121212220101) 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, 2634768742616 + ... + 2634768742653.

It is an arithmetic number, because the mean of its divisors is an integer number (26347687426350).

Almost surely, 2^{100121212220111} is an apocalyptic number.

100121212220111 is a deficient number, since it is larger than the sum of its proper divisors (5269537485289).

100121212220111 is an equidigital number, since it uses as much as digits as its factorization.

100121212220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269537485288.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100121212220111 its reverse (111022212121001), we get a palindrome (211143424341112).

The spelling of 100121212220111 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, one hundred eleven".