11012121231618 has 32 divisors (see below), whose sum is σ = 25113615843456. Its totient is φ = 3189030582528.

The previous prime is 11012121231521. The next prime is 11012121231637. The reversal of 11012121231618 is 81613212121011.

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, 4152382246 + ... + 4152384897.

It is an arithmetic number, because the mean of its divisors is an integer number (784800495108).

Almost surely, 2^{11012121231618} is an apocalyptic number.

11012121231618 is an abundant number, since it is smaller than the sum of its proper divisors (14101494611838).

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

11012121231618 is a wasteful number, since it uses less digits than its factorization.

11012121231618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304767178.

The product of its (nonzero) digits is 1152, while the sum is 30.

Adding to 11012121231618 its reverse (81613212121011), we get a palindrome (92625333352629).

The spelling of 11012121231618 in words is "eleven trillion, twelve billion, one hundred twenty-one million, two hundred thirty-one thousand, six hundred eighteen".