1021211212001 has 4 divisors (see below), whose sum is σ = 1021213713600. Its totient is φ = 1021208710404.

The previous prime is 1021211211973. The next prime is 1021211212027. The reversal of 1021211212001 is 1002121121201.

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 not a de Polignac number, because 1021211212001 - 2²⁶ = 1021144103137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021211212501) 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, 480221 + ... + 1507658.

It is an arithmetic number, because the mean of its divisors is an integer number (255303428400).

Almost surely, 2^{1021211212001} is an apocalyptic number.

It is an amenable number.

1021211212001 is a deficient number, since it is larger than the sum of its proper divisors (2501599).

1021211212001 is an equidigital number, since it uses as much as digits as its factorization.

1021211212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501598.

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

Adding to 1021211212001 its reverse (1002121121201), we get a palindrome (2023332333202).

It can be divided in two parts, 102121121200 and 1, that added together give a palindrome (102121121201).

The spelling of 1021211212001 in words is "one trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, one".