1211231215464 has 64 divisors (see below), whose sum is σ = 3080730723840. Its totient is φ = 396760432320.

The previous prime is 1211231215451. The next prime is 1211231215487. The reversal of 1211231215464 is 4645121321121.

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, 634554 + ... + 1680809.

It is an arithmetic number, because the mean of its divisors is an integer number (48136417560).

Almost surely, 2^{1211231215464} is an apocalyptic number.

It is an amenable number.

1211231215464 is an abundant number, since it is smaller than the sum of its proper divisors (1869499508376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211231215464 is a wasteful number, since it uses less digits than its factorization.

1211231215464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315750 (or 2315746 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

Adding to 1211231215464 its reverse (4645121321121), we get a palindrome (5856352536585).

The spelling of 1211231215464 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, two hundred fifteen thousand, four hundred sixty-four".