121210011101 has 4 divisors (see below), whose sum is σ = 128340011772. Its totient is φ = 114080010432.

The previous prime is 121210011089. The next prime is 121210011107. The reversal of 121210011101 is 101110012121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101110012121 = 59 ⋅1713729019.

It can be written as a sum of positive squares in 2 ways, for example, as 57708531076 + 63501480025 = 240226^2 + 251995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121210011101 is a prime.

It is a super-2 number, since 2×121210011101² (a number of 23 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 (121210011107) 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, 3565000310 + ... + 3565000343.

It is an arithmetic number, because the mean of its divisors is an integer number (32085002943).

Almost surely, 2^121210011101 is an apocalyptic number.

It is an amenable number.

121210011101 is a deficient number, since it is larger than the sum of its proper divisors (7130000671).

121210011101 is an equidigital number, since it uses as much as digits as its factorization.

121210011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7130000670.

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

Adding to 121210011101 its reverse (101110012121), we get a palindrome (222320023222).

The spelling of 121210011101 in words is "one hundred twenty-one billion, two hundred ten million, eleven thousand, one hundred one".