21122201121222 has 16 divisors (see below), whose sum is σ = 42303985328880. Its totient is φ = 7030803192672.

The previous prime is 21122201121199. The next prime is 21122201121239. The reversal of 21122201121222 is 22212110222112.

It is a super-2 number, since 2×21122201121222² (a number of 27 digits) contains 22 as substring.

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, 2482623993 + ... + 2482632500.

It is an arithmetic number, because the mean of its divisors is an integer number (2643999083055).

Almost surely, 2^{21122201121222} is an apocalyptic number.

21122201121222 is an abundant number, since it is smaller than the sum of its proper divisors (21181784207658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122201121222 is a wasteful number, since it uses less digits than its factorization.

21122201121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965257207.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21122201121222 its reverse (22212110222112), we get a palindrome (43334311343334).

The spelling of 21122201121222 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty-two".