1202120121111 has 64 divisors (see below), whose sum is σ = 2045698357248. Its totient is φ = 610957582848.

The previous prime is 1202120121029. The next prime is 1202120121119. The reversal of 1202120121111 is 1111210212021.

It is a happy number.

It is not a de Polignac number, because 1202120121111 - 2¹¹ = 1202120119063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120121119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 462685 + ... + 1618121.

It is an arithmetic number, because the mean of its divisors is an integer number (31964036832).

Almost surely, 2^{1202120121111} is an apocalyptic number.

1202120121111 is a deficient number, since it is larger than the sum of its proper divisors (843578236137).

1202120121111 is a wasteful number, since it uses less digits than its factorization.

1202120121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155600.

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

Adding to 1202120121111 its reverse (1111210212021), we get a palindrome (2313330333132).

It can be divided in two parts, 1202120 and 121111, that added together give a palindrome (1323231).

The spelling of 1202120121111 in words is "one trillion, two hundred two billion, one hundred twenty million, one hundred twenty-one thousand, one hundred eleven".