1201021201101 has 16 divisors (see below), whose sum is σ = 1645401792320. Its totient is φ = 778815233280.

The previous prime is 1201021201063. The next prime is 1201021201103. The reversal of 1201021201101 is 1011021201021.

It is not a de Polignac number, because 1201021201101 - 2²² = 1201017006797 is a prime.

It is a super-2 number, since 2×1201021201101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021201103) 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, 19284766 + ... + 19346943.

It is an arithmetic number, because the mean of its divisors is an integer number (102837612020).

Almost surely, 2^{1201021201101} is an apocalyptic number.

It is an amenable number.

1201021201101 is a deficient number, since it is larger than the sum of its proper divisors (444380591219).

1201021201101 is a wasteful number, since it uses less digits than its factorization.

1201021201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38631996.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201021201101 its reverse (1011021201021), we get a palindrome (2212042402122).

The spelling of 1201021201101 in words is "one trillion, two hundred one billion, twenty-one million, two hundred one thousand, one hundred one".