121311002102101 has 4 divisors (see below), whose sum is σ = 138641145259552. Its totient is φ = 103980858944652.

The previous prime is 121311002102077. The next prime is 121311002102113. The reversal of 121311002102101 is 101201200113121.

It is a happy number.

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 121311002102101 - 2³¹ = 121308854618453 is a prime.

It is a super-2 number, since 2×121311002102101² (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 (121311002142101) 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, 8665071578715 + ... + 8665071578728.

It is an arithmetic number, because the mean of its divisors is an integer number (34660286314888).

Almost surely, 2^{121311002102101} is an apocalyptic number.

It is an amenable number.

121311002102101 is a deficient number, since it is larger than the sum of its proper divisors (17330143157451).

121311002102101 is an equidigital number, since it uses as much as digits as its factorization.

121311002102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17330143157450.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121311002102101 its reverse (101201200113121), we get a palindrome (222512202215222).

The spelling of 121311002102101 in words is "one hundred twenty-one trillion, three hundred eleven billion, two million, one hundred two thousand, one hundred one".