1212210012101 has 4 divisors (see below), whose sum is σ = 1322410922304. Its totient is φ = 1102009101900.

The previous prime is 1212210012077. The next prime is 1212210012109. The reversal of 1212210012101 is 1012100122121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212210012101 is a prime.

It is a super-2 number, since 2×1212210012101² (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 (1212210012109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55100455085 + ... + 55100455106.

It is an arithmetic number, because the mean of its divisors is an integer number (330602730576).

Almost surely, 2^{1212210012101} is an apocalyptic number.

1212210012101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212210012101 is a deficient number, since it is larger than the sum of its proper divisors (110200910203).

1212210012101 is a wasteful number, since it uses less digits than its factorization.

1212210012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110200910202.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212210012101 its reverse (1012100122121), we get a palindrome (2224310134222).

The spelling of 1212210012101 in words is "one trillion, two hundred twelve billion, two hundred ten million, twelve thousand, one hundred one".