121320033021 has 72 divisors (see below), whose sum is σ = 194007078720. Its totient is φ = 72999653760.

The previous prime is 121320032969. The next prime is 121320033041. The reversal of 121320033021 is 120330023121.

121320033021 is a `hidden beast` number, since 12 + 1 + 320 + 0 + 330 + 2 + 1 = 666.

It is not a de Polignac number, because 121320033021 - 2¹³ = 121320024829 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121320032985 and 121320033003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320033041) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 164167470 + ... + 164168208.

It is an arithmetic number, because the mean of its divisors is an integer number (2694542760).

Almost surely, 2^121320033021 is an apocalyptic number.

121320033021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121320033021 is a deficient number, since it is larger than the sum of its proper divisors (72687045699).

121320033021 is a wasteful number, since it uses less digits than its factorization.

121320033021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 121320033021 its reverse (120330023121), we get a palindrome (241650056142).

The spelling of 121320033021 in words is "one hundred twenty-one billion, three hundred twenty million, thirty-three thousand, twenty-one".