1212010100001 has 32 divisors (see below), whose sum is σ = 1805351137920. Its totient is φ = 803608489152.

The previous prime is 1212010099957. The next prime is 1212010100027. The reversal of 1212010100001 is 1000010102121.

It is a happy number.

It is not a de Polignac number, because 1212010100001 - 2²⁶ = 1211942991137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1212010102001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14868511 + ... + 14949803.

It is an arithmetic number, because the mean of its divisors is an integer number (56417223060).

Almost surely, 2^{1212010100001} is an apocalyptic number.

It is an amenable number.

1212010100001 is a deficient number, since it is larger than the sum of its proper divisors (593341037919).

1212010100001 is a wasteful number, since it uses less digits than its factorization.

1212010100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84302 (or 84296 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1212010100001 its reverse (1000010102121), we get a palindrome (2212020202122).

The spelling of 1212010100001 in words is "one trillion, two hundred twelve billion, ten million, one hundred thousand, one".