21121211102222 has 32 divisors (see below), whose sum is σ = 39515014750464. Its totient is φ = 8225791833600.

The previous prime is 21121211102141. The next prime is 21121211102311. The reversal of 21121211102222 is 22220111212112.

It is a super-2 number, since 2×21121211102222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121211102194 and 21121211102203.

It is a congruent number.

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, 26704403 + ... + 27483950.

It is an arithmetic number, because the mean of its divisors is an integer number (1234844210952).

Almost surely, 2^{21121211102222} is an apocalyptic number.

21121211102222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21121211102222 is a deficient number, since it is larger than the sum of its proper divisors (18393803648242).

21121211102222 is a wasteful number, since it uses less digits than its factorization.

21121211102222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54190904.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21121211102222 its reverse (22220111212112), we get a palindrome (43341322314334).

The spelling of 21121211102222 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred eleven million, one hundred two thousand, two hundred twenty-two".