1215114211 has 16 divisors (see below), whose sum is σ = 1251613440. Its totient is φ = 1179303840.

The previous prime is 1215114193. The next prime is 1215114227. The reversal of 1215114211 is 1124115121.

1215114211 = 2614² + 2615² + ... + 2780².

It is a cyclic number.

It is not a de Polignac number, because 1215114211 - 2⁵ = 1215114179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215114811) 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, 1465345 + ... + 1466173.

It is an arithmetic number, because the mean of its divisors is an integer number (78225840).

Almost surely, 2^1215114211 is an apocalyptic number.

1215114211 is a deficient number, since it is larger than the sum of its proper divisors (36499229).

1215114211 is a wasteful number, since it uses less digits than its factorization.

1215114211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194.

The product of its digits is 80, while the sum is 19.

The square root of 1215114211 is about 34858.4883636683. The cubic root of 1215114211 is about 1067.1014253892.

Adding to 1215114211 its reverse (1124115121), we get a palindrome (2339229332).

It can be divided in two parts, 12151 and 14211, that added together give a palindrome (26362).

The spelling of 1215114211 in words is "one billion, two hundred fifteen million, one hundred fourteen thousand, two hundred eleven".