100220012551 has 4 divisors (see below), whose sum is σ = 100225910704. Its totient is φ = 100214114400.

The previous prime is 100220012537. The next prime is 100220012597. The reversal of 100220012551 is 155210022001.

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

It is a cyclic number.

It is not a de Polignac number, because 100220012551 - 2¹⁹ = 100219488263 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 (100220012351) 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, 2923515 + ... + 2957596.

It is an arithmetic number, because the mean of its divisors is an integer number (25056477676).

Almost surely, 2^100220012551 is an apocalyptic number.

100220012551 is a deficient number, since it is larger than the sum of its proper divisors (5898153).

100220012551 is an equidigital number, since it uses as much as digits as its factorization.

100220012551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898152.

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 100220012551 its reverse (155210022001), we get a palindrome (255430034552).

The spelling of 100220012551 in words is "one hundred billion, two hundred twenty million, twelve thousand, five hundred fifty-one".