121302012312021 has 4 divisors (see below), whose sum is σ = 161736016416032. Its totient is φ = 80868008208012.

The previous prime is 121302012312001. The next prime is 121302012312037. The reversal of 121302012312021 is 120213210203121.

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 not a de Polignac number, because 121302012312021 - 2⁶ = 121302012311957 is a prime.

It is a super-2 number, since 2×121302012312021² (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 (121302012312001) 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, 20217002052001 + ... + 20217002052006.

It is an arithmetic number, because the mean of its divisors is an integer number (40434004104008).

Almost surely, 2^{121302012312021} is an apocalyptic number.

It is an amenable number.

121302012312021 is a deficient number, since it is larger than the sum of its proper divisors (40434004104011).

121302012312021 is an equidigital number, since it uses as much as digits as its factorization.

121302012312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40434004104010.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121302012312021 its reverse (120213210203121), we get a palindrome (241515222515142).

The spelling of 121302012312021 in words is "one hundred twenty-one trillion, three hundred two billion, twelve million, three hundred twelve thousand, twenty-one".