121220141213 has 16 divisors (see below), whose sum is σ = 124010460864. Its totient is φ = 118459862400.

The previous prime is 121220141209. The next prime is 121220141267. The reversal of 121220141213 is 312141022121.

It is a cyclic number.

It is not a de Polignac number, because 121220141213 - 2² = 121220141209 is a prime.

It is a super-2 number, since 2×121220141213² (a number of 23 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 (121220140213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17445806 + ... + 17452752.

It is an arithmetic number, because the mean of its divisors is an integer number (7750653804).

Almost surely, 2^121220141213 is an apocalyptic number.

It is an amenable number.

121220141213 is a deficient number, since it is larger than the sum of its proper divisors (2790319651).

121220141213 is a wasteful number, since it uses less digits than its factorization.

121220141213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9052.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121220141213 its reverse (312141022121), we get a palindrome (433361163334).

The spelling of 121220141213 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred forty-one thousand, two hundred thirteen".