1221110100122 has 32 divisors (see below), whose sum is σ = 2138997542400. Its totient is φ = 516924385200.

The previous prime is 1221110100101. The next prime is 1221110100131. The reversal of 1221110100122 is 2210010111221.

It is a super-2 number, since 2×1221110100122² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221110100097 and 1221110100106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24732254 + ... + 24781577.

It is an arithmetic number, because the mean of its divisors is an integer number (66843673200).

Almost surely, 2^{1221110100122} is an apocalyptic number.

1221110100122 is a deficient number, since it is larger than the sum of its proper divisors (917887442278).

1221110100122 is a wasteful number, since it uses less digits than its factorization.

1221110100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49513922.

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

Adding to 1221110100122 its reverse (2210010111221), we get a palindrome (3431120211343).

The spelling of 1221110100122 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred thousand, one hundred twenty-two".