121210211221103 has 4 divisors (see below), whose sum is σ = 124029053342568. Its totient is φ = 118391369099640.

The previous prime is 121210211221097. The next prime is 121210211221133. The reversal of 121210211221103 is 301122112012121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121210211221103 is a prime.

It is a super-2 number, since 2×121210211221103² (a number of 29 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 (121210211221133) 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, 1409421060668 + ... + 1409421060753.

It is an arithmetic number, because the mean of its divisors is an integer number (31007263335642).

Almost surely, 2^{121210211221103} is an apocalyptic number.

121210211221103 is a deficient number, since it is larger than the sum of its proper divisors (2818842121465).

121210211221103 is an equidigital number, since it uses as much as digits as its factorization.

121210211221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818842121464.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121210211221103 its reverse (301122112012121), we get a palindrome (422332323233224).

The spelling of 121210211221103 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred eleven million, two hundred twenty-one thousand, one hundred three".