1215121100422 has 32 divisors (see below), whose sum is σ = 1837978781184. Its totient is φ = 602487480000.

The previous prime is 1215121100407. The next prime is 1215121100437. The reversal of 1215121100422 is 2240011215121.

It is an interprime number because it is at equal distance from previous prime (1215121100407) and next prime (1215121100437).

It is a junction number, because it is equal to n+sod(n) for n = 1215121100393 and 1215121100402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148780183 + ... + 148788349.

It is an arithmetic number, because the mean of its divisors is an integer number (57436836912).

Almost surely, 2^{1215121100422} is an apocalyptic number.

1215121100422 is a deficient number, since it is larger than the sum of its proper divisors (622857680762).

1215121100422 is a wasteful number, since it uses less digits than its factorization.

1215121100422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9684.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 1215121100422 its reverse (2240011215121), we get a palindrome (3455132315543).

The spelling of 1215121100422 in words is "one trillion, two hundred fifteen billion, one hundred twenty-one million, one hundred thousand, four hundred twenty-two".