1210211211101 has 4 divisors (see below), whose sum is σ = 1210222335612. Its totient is φ = 1210200086592.

The previous prime is 1210211211061. The next prime is 1210211211113. The reversal of 1210211211101 is 1011121120121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 758762944900 + 451448266201 = 871070^2 + 671899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210211211101 - 2⁶ = 1210211211037 is a prime.

It is a super-2 number, since 2×1210211211101² (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 (1210211211301) 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, 5397446 + ... + 5617191.

It is an arithmetic number, because the mean of its divisors is an integer number (302555583903).

Almost surely, 2^{1210211211101} is an apocalyptic number.

It is an amenable number.

1210211211101 is a deficient number, since it is larger than the sum of its proper divisors (11124511).

1210211211101 is a wasteful number, since it uses less digits than its factorization.

1210211211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124510.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1210211211101 its reverse (1011121120121), we get a palindrome (2221332331222).

The spelling of 1210211211101 in words is "one trillion, two hundred ten billion, two hundred eleven million, two hundred eleven thousand, one hundred one".