121222021223121 has 384 divisors, whose sum is σ = 215607898275840. Its totient is φ = 59184813542400.

The previous prime is 121222021223117. The next prime is 121222021223143. The reversal of 121222021223121 is 121322120222121.

It is not a de Polignac number, because 121222021223121 - 2² = 121222021223117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121222021223091 and 121222021223100.

It is not an unprimeable number, because it can be changed into a prime (121222021223101) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 246888026686 + ... + 246888027176.

It is an arithmetic number, because the mean of its divisors is an integer number (561478901760).

Almost surely, 2^{121222021223121} is an apocalyptic number.

It is an amenable number.

121222021223121 is a deficient number, since it is larger than the sum of its proper divisors (94385877052719).

121222021223121 is a wasteful number, since it uses less digits than its factorization.

121222021223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1144 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 121222021223121 its reverse (121322120222121), we get a palindrome (242544141445242).

The spelling of 121222021223121 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, twenty-one million, two hundred twenty-three thousand, one hundred twenty-one".