20111002222122 has 36 divisors (see below), whose sum is σ = 50687934174306. Its totient is φ = 5746000634640.

The previous prime is 20111002222117. The next prime is 20111002222127. The reversal of 20111002222122 is 22122220011102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20111002222117) and next prime (20111002222127).

It can be written as a sum of positive squares in only one way, i.e., 10675974642921 + 9435027579201 = 3267411^2 + 3071649^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20111002222095 and 20111002222104.

It is not an unprimeable number, because it can be changed into a prime (20111002222127) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11400794029 + ... + 11400795792.

Almost surely, 2^{20111002222122} is an apocalyptic number.

20111002222122 is an abundant number, since it is smaller than the sum of its proper divisors (30576931952184).

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

20111002222122 is a wasteful number, since it uses less digits than its factorization.

20111002222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22801589843 (or 22801589833 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20111002222122 its reverse (22122220011102), we get a palindrome (42233222233224).

The spelling of 20111002222122 in words is "twenty trillion, one hundred eleven billion, two million, two hundred twenty-two thousand, one hundred twenty-two".