1212102020001 has 4 divisors (see below), whose sum is σ = 1616136026672. Its totient is φ = 808068013332.

The previous prime is 1212102019993. The next prime is 1212102020009. The reversal of 1212102020001 is 1000202012121.

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 an interprime number because it is at equal distance from previous prime (1212102019993) and next prime (1212102020009).

It is not a de Polignac number, because 1212102020001 - 2³ = 1212102019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212102020009) 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 3 ways as a sum of consecutive naturals, for example, 202017003331 + ... + 202017003336.

It is an arithmetic number, because the mean of its divisors is an integer number (404034006668).

Almost surely, 2^{1212102020001} is an apocalyptic number.

It is an amenable number.

1212102020001 is a deficient number, since it is larger than the sum of its proper divisors (404034006671).

1212102020001 is an equidigital number, since it uses as much as digits as its factorization.

1212102020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404034006670.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1212102020001 its reverse (1000202012121), we get a palindrome (2212304032122).

The spelling of 1212102020001 in words is "one trillion, two hundred twelve billion, one hundred two million, twenty thousand, one".