121244430215 has 16 divisors (see below), whose sum is σ = 145707409440. Its totient is φ = 96852927360.

The previous prime is 121244430211. The next prime is 121244430221. The reversal of 121244430215 is 512034442121.

It is a happy number.

It is not a de Polignac number, because 121244430215 - 2² = 121244430211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244430211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11078216 + ... + 11089154.

It is an arithmetic number, because the mean of its divisors is an integer number (9106713090).

Almost surely, 2^121244430215 is an apocalyptic number.

121244430215 is a deficient number, since it is larger than the sum of its proper divisors (24462979225).

121244430215 is a wasteful number, since it uses less digits than its factorization.

121244430215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14002.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 121244430215 its reverse (512034442121), we get a palindrome (633278872336).

The spelling of 121244430215 in words is "one hundred twenty-one billion, two hundred forty-four million, four hundred thirty thousand, two hundred fifteen".