11021200111972 has 96 divisors (see below), whose sum is σ = 21662604230400. Its totient is φ = 4881669990912.

The previous prime is 11021200111939. The next prime is 11021200111973. The reversal of 11021200111972 is 27911100212011.

It is a self number, because there is not a number n which added to its sum of digits gives 11021200111972.

It is not an unprimeable number, because it can be changed into a prime (11021200111973) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25447654 + ... + 25877122.

It is an arithmetic number, because the mean of its divisors is an integer number (225652127400).

Almost surely, 2^{11021200111972} is an apocalyptic number.

It is an amenable number.

11021200111972 is a deficient number, since it is larger than the sum of its proper divisors (10641404118428).

11021200111972 is a wasteful number, since it uses less digits than its factorization.

11021200111972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429845 (or 429843 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 28.

Adding to 11021200111972 its reverse (27911100212011), we get a palindrome (38932300323983).

The spelling of 11021200111972 in words is "eleven trillion, twenty-one billion, two hundred million, one hundred eleven thousand, nine hundred seventy-two".