121310103020021 has 4 divisors (see below), whose sum is σ = 121364186884512. Its totient is φ = 121256019155532.

The previous prime is 121310103019969. The next prime is 121310103020033. The reversal of 121310103020021 is 120020301013121.

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 121310103020021 - 2⁶ = 121310103019957 is a prime.

It is a super-2 number, since 2×121310103020021² (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 (121310103020321) 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, 27041928881 + ... + 27041933366.

It is an arithmetic number, because the mean of its divisors is an integer number (30341046721128).

Almost surely, 2^{121310103020021} is an apocalyptic number.

It is an amenable number.

121310103020021 is a deficient number, since it is larger than the sum of its proper divisors (54083864491).

121310103020021 is an equidigital number, since it uses as much as digits as its factorization.

121310103020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54083864490.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121310103020021 its reverse (120020301013121), we get a palindrome (241330404033142).

The spelling of 121310103020021 in words is "one hundred twenty-one trillion, three hundred ten billion, one hundred three million, twenty thousand, twenty-one".