1221201121119 has 32 divisors (see below), whose sum is σ = 1902211491840. Its totient is φ = 682356310272.

The previous prime is 1221201121099. The next prime is 1221201121187. The reversal of 1221201121119 is 9111211021221.

It is not a de Polignac number, because 1221201121119 - 2¹⁹ = 1221200596831 is a prime.

It is a super-2 number, since 2×1221201121119² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221201121219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 512787 + ... + 1644795.

It is an arithmetic number, because the mean of its divisors is an integer number (59444109120).

Almost surely, 2^{1221201121119} is an apocalyptic number.

1221201121119 is a deficient number, since it is larger than the sum of its proper divisors (681010370721).

1221201121119 is a wasteful number, since it uses less digits than its factorization.

1221201121119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133159.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 1221201121119 in words is "one trillion, two hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, one hundred nineteen".