121220633273 has 16 divisors (see below), whose sum is σ = 127202866560. Its totient is φ = 115359484800.

The previous prime is 121220633269. The next prime is 121220633299. The reversal of 121220633273 is 372336022121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121220633273 - 2² = 121220633269 is a prime.

It is a super-2 number, since 2×121220633273² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220633773) 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, 10455986 + ... + 10467572.

It is an arithmetic number, because the mean of its divisors is an integer number (7950179160).

Almost surely, 2^121220633273 is an apocalyptic number.

It is an amenable number.

121220633273 is a deficient number, since it is larger than the sum of its proper divisors (5982233287).

121220633273 is a wasteful number, since it uses less digits than its factorization.

121220633273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16768.

The product of its (nonzero) digits is 18144, while the sum is 32.

Adding to 121220633273 its reverse (372336022121), we get a palindrome (493556655394).

The spelling of 121220633273 in words is "one hundred twenty-one billion, two hundred twenty million, six hundred thirty-three thousand, two hundred seventy-three".