1221111000122 has 64 divisors (see below), whose sum is σ = 2080261322496. Its totient is φ = 533349273600.

The previous prime is 1221111000107. The next prime is 1221111000149. The reversal of 1221111000122 is 2210001111221.

It is a super-2 number, since 2×1221111000122² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221111000097 and 1221111000106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89563418 + ... + 89577050.

It is an arithmetic number, because the mean of its divisors is an integer number (32504083164).

Almost surely, 2^{1221111000122} is an apocalyptic number.

1221111000122 is a deficient number, since it is larger than the sum of its proper divisors (859150322374).

1221111000122 is a wasteful number, since it uses less digits than its factorization.

1221111000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15255.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221111000122 its reverse (2210001111221), we get a palindrome (3431112111343).

The spelling of 1221111000122 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty-two", and thus it is an aban number.