121033821 has 16 divisors (see below), whose sum is σ = 167132160. Its totient is φ = 77862720.

The previous prime is 121033817. The next prime is 121033823. The reversal of 121033821 is 128330121.

It is not a de Polignac number, because 121033821 - 2² = 121033817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121033823) 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, 3460 + ... + 15938.

It is an arithmetic number, because the mean of its divisors is an integer number (10445760).

Almost surely, 2^121033821 is an apocalyptic number.

It is an amenable number.

121033821 is a deficient number, since it is larger than the sum of its proper divisors (46098339).

121033821 is a wasteful number, since it uses less digits than its factorization.

121033821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12596.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 121033821 is about 11001.5372107720. The cubic root of 121033821 is about 494.6548231238.

Adding to 121033821 its reverse (128330121), we get a palindrome (249363942).

The spelling of 121033821 in words is "one hundred twenty-one million, thirty-three thousand, eight hundred twenty-one".