21121120112222 has 16 divisors (see below), whose sum is σ = 34175692000800. Its totient is φ = 9731935136352.

The previous prime is 21121120112201. The next prime is 21121120112233. The reversal of 21121120112222 is 22221102112112.

It is a super-2 number, since 2×21121120112222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121120112194 and 21121120112203.

It is a congruent number.

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, 678073553 + ... + 678104700.

It is an arithmetic number, because the mean of its divisors is an integer number (2135980750050).

Almost surely, 2^{21121120112222} is an apocalyptic number.

21121120112222 is a deficient number, since it is larger than the sum of its proper divisors (13054571888578).

21121120112222 is a wasteful number, since it uses less digits than its factorization.

21121120112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356178867.

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

Adding to 21121120112222 its reverse (22221102112112), we get a palindrome (43342222224334).

The spelling of 21121120112222 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twelve thousand, two hundred twenty-two".