1201122020121 has 32 divisors (see below), whose sum is σ = 1697645537280. Its totient is φ = 753816201600.

The previous prime is 1201122020071. The next prime is 1201122020159. The reversal of 1201122020121 is 1210202211021.

It is not a de Polignac number, because 1201122020121 - 2⁹ = 1201122019609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201122020121.

It is not an unprimeable number, because it can be changed into a prime (1201122020521) 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, 2572086 + ... + 3002976.

It is an arithmetic number, because the mean of its divisors is an integer number (53051423040).

Almost surely, 2^{1201122020121} is an apocalyptic number.

It is an amenable number.

1201122020121 is a deficient number, since it is larger than the sum of its proper divisors (496523517159).

1201122020121 is a wasteful number, since it uses less digits than its factorization.

1201122020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431557.

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

Adding to 1201122020121 its reverse (1210202211021), we get a palindrome (2411324231142).

The spelling of 1201122020121 in words is "one trillion, two hundred one billion, one hundred twenty-two million, twenty thousand, one hundred twenty-one".