1200111102101 has 2 divisors, whose sum is σ = 1200111102102. Its totient is φ = 1200111102100.

The previous prime is 1200111102089. The next prime is 1200111102107. The reversal of 1200111102101 is 1012011110021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 723494842225 + 476616259876 = 850585^2 + 690374^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200111102101 - 2⁶ = 1200111102037 is a prime.

It is a super-2 number, since 2×1200111102101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200111102107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600055551050 + 600055551051.

It is an arithmetic number, because the mean of its divisors is an integer number (600055551051).

Almost surely, 2^{1200111102101} is an apocalyptic number.

It is an amenable number.

1200111102101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200111102101 is an equidigital number, since it uses as much as digits as its factorization.

1200111102101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1200111102101 its reverse (1012011110021), we get a palindrome (2212122212122).

The spelling of 1200111102101 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred two thousand, one hundred one".