121020020101 has 4 divisors (see below), whose sum is σ = 121195158304. Its totient is φ = 120844881900.

The previous prime is 121020020059. The next prime is 121020020113. The reversal of 121020020101 is 101020020121.

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 not a de Polignac number, because 121020020101 - 2²⁵ = 120986465669 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 (121020023101) 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, 87568065 + ... + 87569446.

It is an arithmetic number, because the mean of its divisors is an integer number (30298789576).

Almost surely, 2^121020020101 is an apocalyptic number.

It is an amenable number.

121020020101 is a deficient number, since it is larger than the sum of its proper divisors (175138203).

121020020101 is an equidigital number, since it uses as much as digits as its factorization.

121020020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175138202.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121020020101 its reverse (101020020121), we get a palindrome (222040040222).

It can be divided in two parts, 121020020 and 101, that added together give a palindrome (121020121).

The spelling of 121020020101 in words is "one hundred twenty-one billion, twenty million, twenty thousand, one hundred one".