1201202111121 has 12 divisors (see below), whose sum is σ = 1701356624592. Its totient is φ = 753695441728.

The previous prime is 1201202111119. The next prime is 1201202111159. The reversal of 1201202111121 is 1211112021021.

It is a happy number.

It is not a de Polignac number, because 1201202111121 - 2¹ = 1201202111119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201202111121.

It is not an unprimeable number, because it can be changed into a prime (1201207111121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 692733915 + ... + 692735648.

It is an arithmetic number, because the mean of its divisors is an integer number (141779718716).

Almost surely, 2^{1201202111121} is an apocalyptic number.

It is an amenable number.

1201202111121 is a deficient number, since it is larger than the sum of its proper divisors (500154513471).

1201202111121 is a wasteful number, since it uses less digits than its factorization.

1201202111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385469600 (or 1385469583 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1201202111121 its reverse (1211112021021), we get a palindrome (2412314132142).

The spelling of 1201202111121 in words is "one trillion, two hundred one billion, two hundred two million, one hundred eleven thousand, one hundred twenty-one".