21122011220122 has 4 divisors (see below), whose sum is σ = 31683016830186. Its totient is φ = 10561005610060.

The previous prime is 21122011220113. The next prime is 21122011220269. The reversal of 21122011220122 is 22102211022112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18109186629121 + 3012824591001 = 4255489^2 + 1735749^2 .

It is a super-2 number, since 2×21122011220122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122011220122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280502805029 + ... + 5280502805032.

Almost surely, 2^{21122011220122} is an apocalyptic number.

21122011220122 is a deficient number, since it is larger than the sum of its proper divisors (10561005610064).

21122011220122 is a wasteful number, since it uses less digits than its factorization.

21122011220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10561005610063.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122011220122 its reverse (22102211022112), we get a palindrome (43224222242234).

The spelling of 21122011220122 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, two hundred twenty thousand, one hundred twenty-two".