101551221445 has 4 divisors (see below), whose sum is σ = 121861465740. Its totient is φ = 81240977152.

The previous prime is 101551221271. The next prime is 101551221463. The reversal of 101551221445 is 544122155101.

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 16333351204 + 85217870241 = 127802^2 + 291921^2 .

It is a cyclic number.

It is not a de Polignac number, because 101551221445 - 2³³ = 92961286853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10155122140 + ... + 10155122149.

It is an arithmetic number, because the mean of its divisors is an integer number (30465366435).

Almost surely, 2^101551221445 is an apocalyptic number.

It is an amenable number.

101551221445 is a deficient number, since it is larger than the sum of its proper divisors (20310244295).

101551221445 is an equidigital number, since it uses as much as digits as its factorization.

101551221445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20310244294.

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 101551221445 its reverse (544122155101), we get a palindrome (645673376546).

The spelling of 101551221445 in words is "one hundred one billion, five hundred fifty-one million, two hundred twenty-one thousand, four hundred forty-five".