21111201122 has 16 divisors (see below), whose sum is σ = 34697793312. Its totient is φ = 9553725120.

The previous prime is 21111201101. The next prime is 21111201149. The reversal of 21111201122 is 22110211112.

It is a junction number, because it is equal to n+sod(n) for n = 21111201097 and 21111201106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2108663 + ... + 2118650.

It is an arithmetic number, because the mean of its divisors is an integer number (2168612082).

Almost surely, 2^21111201122 is an apocalyptic number.

21111201122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21111201122 is a deficient number, since it is larger than the sum of its proper divisors (13586592190).

21111201122 is a wasteful number, since it uses less digits than its factorization.

21111201122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227553.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21111201122 its reverse (22110211112), we get a palindrome (43221412234).

The spelling of 21111201122 in words is "twenty-one billion, one hundred eleven million, two hundred one thousand, one hundred twenty-two".