121123212013021 has 8 divisors (see below), whose sum is σ = 121302814117464. Its totient is φ = 120943611946560.

The previous prime is 121123212013019. The next prime is 121123212013043. The reversal of 121123212013021 is 120310212321121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52493683225 + 121070718329796 = 229115^2 + 11003214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121123212013021 - 2¹ = 121123212013019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121123212012983 and 121123212013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123212013081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152424951 + ... + 153217531.

It is an arithmetic number, because the mean of its divisors is an integer number (15162851764683).

Almost surely, 2^{121123212013021} is an apocalyptic number.

It is an amenable number.

121123212013021 is a deficient number, since it is larger than the sum of its proper divisors (179602104443).

121123212013021 is an equidigital number, since it uses as much as digits as its factorization.

121123212013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018991.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121123212013021 its reverse (120310212321121), we get a palindrome (241433424334142).

The spelling of 121123212013021 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, two hundred twelve million, thirteen thousand, twenty-one".