1201121202001 has 16 divisors (see below), whose sum is σ = 1453618776960. Its totient is φ = 968864267520.

The previous prime is 1201121201999. The next prime is 1201121202019. The reversal of 1201121202001 is 1002021211021.

It is a cyclic number.

It is not a de Polignac number, because 1201121202001 - 2¹ = 1201121201999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201121202041) 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, 526695 + ... + 1636963.

It is an arithmetic number, because the mean of its divisors is an integer number (90851173560).

Almost surely, 2^{1201121202001} is an apocalyptic number.

It is an amenable number.

1201121202001 is a deficient number, since it is larger than the sum of its proper divisors (252497574959).

1201121202001 is a wasteful number, since it uses less digits than its factorization.

1201121202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119384.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201121202001 its reverse (1002021211021), we get a palindrome (2203142413022).

The spelling of 1201121202001 in words is "one trillion, two hundred one billion, one hundred twenty-one million, two hundred two thousand, one".