100222221172 has 6 divisors (see below), whose sum is σ = 175388887058. Its totient is φ = 50111110584.

The previous prime is 100222221133. The next prime is 100222221173. The reversal of 100222221172 is 271122222001.

It can be written as a sum of positive squares in only one way, i.e., 99121706896 + 1100514276 = 314836^2 + 33174^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100222221173) 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 as a sum of consecutive naturals, namely, 12527777643 + ... + 12527777650.

Almost surely, 2^100222221172 is an apocalyptic number.

It is an amenable number.

100222221172 is a deficient number, since it is larger than the sum of its proper divisors (75166665886).

100222221172 is a wasteful number, since it uses less digits than its factorization.

100222221172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25055555297 (or 25055555295 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 100222221172 its reverse (271122222001), we get a palindrome (371344443173).

The spelling of 100222221172 in words is "one hundred billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred seventy-two".