1212100112001 has 16 divisors (see below), whose sum is σ = 1637678254464. Its totient is φ = 797364994944.

The previous prime is 1212100111991. The next prime is 1212100112009. The reversal of 1212100112001 is 1002110012121.

It is not a de Polignac number, because 1212100112001 - 2¹⁴ = 1212100095617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212100112009) 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, 8761150 + ... + 8898423.

It is an arithmetic number, because the mean of its divisors is an integer number (102354890904).

Almost surely, 2^{1212100112001} is an apocalyptic number.

It is an amenable number.

1212100112001 is a deficient number, since it is larger than the sum of its proper divisors (425578142463).

1212100112001 is a wasteful number, since it uses less digits than its factorization.

1212100112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17659880.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1212100112001 its reverse (1002110012121), we get a palindrome (2214210124122).

The spelling of 1212100112001 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred twelve thousand, one".