100515211222 has 4 divisors (see below), whose sum is σ = 150772816836. Its totient is φ = 50257605610.

The previous prime is 100515211169. The next prime is 100515211231. The reversal of 100515211222 is 222112515001.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 100515211193 and 100515211202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25128802804 + ... + 25128802807.

It is an arithmetic number, because the mean of its divisors is an integer number (37693204209).

Almost surely, 2^100515211222 is an apocalyptic number.

100515211222 is a deficient number, since it is larger than the sum of its proper divisors (50257605614).

100515211222 is an equidigital number, since it uses as much as digits as its factorization.

100515211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50257605613.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 100515211222 its reverse (222112515001), we get a palindrome (322627726223).

The spelling of 100515211222 in words is "one hundred billion, five hundred fifteen million, two hundred eleven thousand, two hundred twenty-two".