1212100002101 has 4 divisors (see below), whose sum is σ = 1212102204012. Its totient is φ = 1212097800192.

The previous prime is 1212100002073. The next prime is 1212100002119. The reversal of 1212100002101 is 1012000012121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1200670254001 + 11429748100 = 1095751^2 + 106910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212100002101 - 2⁶ = 1212100002037 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 (1212100002131) 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, 548405 + ... + 1650741.

It is an arithmetic number, because the mean of its divisors is an integer number (303025551003).

Almost surely, 2^{1212100002101} is an apocalyptic number.

It is an amenable number.

1212100002101 is a deficient number, since it is larger than the sum of its proper divisors (2201911).

1212100002101 is a wasteful number, since it uses less digits than its factorization.

1212100002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201910.

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

Adding to 1212100002101 its reverse (1012000012121), we get a palindrome (2224100014222).

The spelling of 1212100002101 in words is "one trillion, two hundred twelve billion, one hundred million, two thousand, one hundred one".