1201121211101 has 4 divisors (see below), whose sum is σ = 1372709955552. Its totient is φ = 1029532466652.

The previous prime is 1201121211083. The next prime is 1201121211109. The reversal of 1201121211101 is 1011121211021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201121211101 - 2¹⁸ = 1201120948957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121211109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85794372215 + ... + 85794372228.

It is an arithmetic number, because the mean of its divisors is an integer number (343177488888).

Almost surely, 2^{1201121211101} is an apocalyptic number.

It is an amenable number.

1201121211101 is a deficient number, since it is larger than the sum of its proper divisors (171588744451).

1201121211101 is an equidigital number, since it uses as much as digits as its factorization.

1201121211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171588744450.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1201121211101 its reverse (1011121211021), we get a palindrome (2212242422122).

The spelling of 1201121211101 in words is "one trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred one".