1221100001122 has 8 divisors (see below), whose sum is σ = 1832558113836. Its totient is φ = 610247296512.

The previous prime is 1221100001087. The next prime is 1221100001141. The reversal of 1221100001122 is 2211000011221.

It can be written as a sum of positive squares in 2 ways, for example, as 1084657677961 + 136442323161 = 1041469^2 + 369381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151346983 + ... + 151355050.

Almost surely, 2^{1221100001122} is an apocalyptic number.

1221100001122 is a deficient number, since it is larger than the sum of its proper divisors (611458112714).

1221100001122 is a wasteful number, since it uses less digits than its factorization.

1221100001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302704052.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221100001122 its reverse (2211000011221), we get a palindrome (3432100012343).

The spelling of 1221100001122 in words is "one trillion, two hundred twenty-one billion, one hundred million, one thousand, one hundred twenty-two".