121020212220213 has 4 divisors (see below), whose sum is σ = 161360282960288. Its totient is φ = 80680141480140.

The previous prime is 121020212220209. The next prime is 121020212220217. The reversal of 121020212220213 is 312022212020121.

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 an interprime number because it is at equal distance from previous prime (121020212220209) and next prime (121020212220217).

It is not a de Polignac number, because 121020212220213 - 2² = 121020212220209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121020212220213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020212220217) 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, 20170035370033 + ... + 20170035370038.

It is an arithmetic number, because the mean of its divisors is an integer number (40340070740072).

Almost surely, 2^{121020212220213} is an apocalyptic number.

It is an amenable number.

121020212220213 is a deficient number, since it is larger than the sum of its proper divisors (40340070740075).

121020212220213 is an equidigital number, since it uses as much as digits as its factorization.

121020212220213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40340070740074.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121020212220213 its reverse (312022212020121), we get a palindrome (433042424240334).

The spelling of 121020212220213 in words is "one hundred twenty-one trillion, twenty billion, two hundred twelve million, two hundred twenty thousand, two hundred thirteen".