1201111220101 has 16 divisors (see below), whose sum is σ = 1295062464640. Its totient is φ = 1107383140800.

The previous prime is 1201111220039. The next prime is 1201111220137. The reversal of 1201111220101 is 1010221111021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201111220101 - 2³⁹ = 651355406213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111220801) 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, 64625656 + ... + 64644238.

It is an arithmetic number, because the mean of its divisors is an integer number (80941404040).

Almost surely, 2^{1201111220101} is an apocalyptic number.

It is an amenable number.

1201111220101 is a deficient number, since it is larger than the sum of its proper divisors (93951244539).

1201111220101 is a wasteful number, since it uses less digits than its factorization.

1201111220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24316.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201111220101 its reverse (1010221111021), we get a palindrome (2211332331122).

The spelling of 1201111220101 in words is "one trillion, two hundred one billion, one hundred eleven million, two hundred twenty thousand, one hundred one".