1221011001122 has 16 divisors (see below), whose sum is σ = 1998037062144. Its totient is φ = 554999706000.

The previous prime is 1221011001121. The next prime is 1221011001149. The reversal of 1221011001122 is 2211001101221.

It is a junction number, because it is equal to n+sod(n) for n = 1221011001097 and 1221011001106.

It is not an unprimeable number, because it can be changed into a prime (1221011001121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2974847 + ... + 3360317.

It is an arithmetic number, because the mean of its divisors is an integer number (124877316384).

Almost surely, 2^{1221011001122} is an apocalyptic number.

1221011001122 is a deficient number, since it is larger than the sum of its proper divisors (777026061022).

1221011001122 is a wasteful number, since it uses less digits than its factorization.

1221011001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529465.

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

Adding to 1221011001122 its reverse (2211001101221), we get a palindrome (3432012102343).

The spelling of 1221011001122 in words is "one trillion, two hundred twenty-one billion, eleven million, one thousand, one hundred twenty-two".