1210211100101 has 4 divisors (see below), whose sum is σ = 1211230655712. Its totient is φ = 1209191544492.

The previous prime is 1210211100073. The next prime is 1210211100113. The reversal of 1210211100101 is 1010011120121.

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 a de Polignac number, because none of the positive numbers 2^k-1210211100101 is a prime.

It is a super-2 number, since 2×1210211100101² (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 (1210211100001) 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, 509776025 + ... + 509778398.

It is an arithmetic number, because the mean of its divisors is an integer number (302807663928).

Almost surely, 2^{1210211100101} is an apocalyptic number.

It is an amenable number.

1210211100101 is a deficient number, since it is larger than the sum of its proper divisors (1019555611).

1210211100101 is a wasteful number, since it uses less digits than its factorization.

1210211100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019555610.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1210211100101 its reverse (1010011120121), we get a palindrome (2220222220222).

The spelling of 1210211100101 in words is "one trillion, two hundred ten billion, two hundred eleven million, one hundred thousand, one hundred one".