1200012102101 has 4 divisors (see below), whose sum is σ = 1200131385804. Its totient is φ = 1199892818400.

The previous prime is 1200012102011. The next prime is 1200012102103. The reversal of 1200012102101 is 1012012100021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 974386152100 + 225625950001 = 987110^2 + 475001^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200012102101 - 2²⁶ = 1199944993237 is a prime.

It is a super-2 number, since 2×1200012102101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200012102103) 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, 59626760 + ... + 59646881.

It is an arithmetic number, because the mean of its divisors is an integer number (300032846451).

Almost surely, 2^{1200012102101} is an apocalyptic number.

It is an amenable number.

1200012102101 is a deficient number, since it is larger than the sum of its proper divisors (119283703).

1200012102101 is a wasteful number, since it uses less digits than its factorization.

1200012102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119283702.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200012102101 its reverse (1012012100021), we get a palindrome (2212024202122).

The spelling of 1200012102101 in words is "one trillion, two hundred billion, twelve million, one hundred two thousand, one hundred one".