11215401812 has 12 divisors (see below), whose sum is σ = 19640527200. Its totient is φ = 5603822616.

The previous prime is 11215401787. The next prime is 11215401829. The reversal of 11215401812 is 21810451211.

It is a super-2 number, since 2×11215401812² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963062 + ... + 974637.

It is an arithmetic number, because the mean of its divisors is an integer number (1636710600).

Almost surely, 2^11215401812 is an apocalyptic number.

It is an amenable number.

11215401812 is a deficient number, since it is larger than the sum of its proper divisors (8425125388).

11215401812 is a wasteful number, since it uses less digits than its factorization.

11215401812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939150 (or 1939148 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 26.

The spelling of 11215401812 in words is "eleven billion, two hundred fifteen million, four hundred one thousand, eight hundred twelve".