121020101 has 4 divisors (see below), whose sum is σ = 127389600. Its totient is φ = 114650604.

The previous prime is 121020091. The next prime is 121020113. The reversal of 121020101 is 101020121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101020121 = 67 ⋅1507763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121020101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020131) 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, 3184721 + ... + 3184758.

It is an arithmetic number, because the mean of its divisors is an integer number (31847400).

Almost surely, 2^121020101 is an apocalyptic number.

It is an amenable number.

121020101 is a deficient number, since it is larger than the sum of its proper divisors (6369499).

121020101 is an equidigital number, since it uses as much as digits as its factorization.

121020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6369498.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121020101 is about 11000.9136438752. The cubic root of 121020101 is about 494.6361315973.

Adding to 121020101 its reverse (101020121), we get a palindrome (222040222).

It can be divided in two parts, 121020 and 101, that added together give a palindrome (121121).

The spelling of 121020101 in words is "one hundred twenty-one million, twenty thousand, one hundred one".