1202120011221 has 16 divisors (see below), whose sum is σ = 1647194394048. Its totient is φ = 779257065600.

The previous prime is 1202120011171. The next prime is 1202120011241. The reversal of 1202120011221 is 1221100212021.

It is not a de Polignac number, because 1202120011221 - 2¹⁴ = 1202119994837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202120011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120011241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3272440 + ... + 3621201.

It is an arithmetic number, because the mean of its divisors is an integer number (102949649628).

Almost surely, 2^{1202120011221} is an apocalyptic number.

It is an amenable number.

1202120011221 is a deficient number, since it is larger than the sum of its proper divisors (445074382827).

1202120011221 is a wasteful number, since it uses less digits than its factorization.

1202120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895252.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1202120011221 its reverse (1221100212021), we get a palindrome (2423220223242).

The spelling of 1202120011221 in words is "one trillion, two hundred two billion, one hundred twenty million, eleven thousand, two hundred twenty-one".