1210211001001 has 4 divisors (see below), whose sum is σ = 1210221939600. Its totient is φ = 1210200062404.

The previous prime is 1210211000981. The next prime is 1210211001029. The reversal of 1210211001001 is 1001001120121.

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 1210211001001 - 2²⁹ = 1209674130089 is a prime.

It is a super-2 number, since 2×1210211001001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210211001031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5301631 + ... + 5525188.

It is an arithmetic number, because the mean of its divisors is an integer number (302555484900).

Almost surely, 2^{1210211001001} is an apocalyptic number.

It is an amenable number.

1210211001001 is a deficient number, since it is larger than the sum of its proper divisors (10938599).

1210211001001 is a wasteful number, since it uses less digits than its factorization.

1210211001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10938598.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1210211001001 its reverse (1001001120121), we get a palindrome (2211212121122).

The spelling of 1210211001001 in words is "one trillion, two hundred ten billion, two hundred eleven million, one thousand, one".