121302021 has 16 divisors (see below), whose sum is σ = 175881024. Its totient is φ = 74052864.

The previous prime is 121302019. The next prime is 121302029. The reversal of 121302021 is 120203121.

It is not a de Polignac number, because 121302021 - 2¹ = 121302019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121301988 and 121302006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302029) 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, 30255 + ... + 34028.

It is an arithmetic number, because the mean of its divisors is an integer number (10992564).

Almost surely, 2^121302021 is an apocalyptic number.

It is an amenable number.

121302021 is a deficient number, since it is larger than the sum of its proper divisors (54579003).

121302021 is a wasteful number, since it uses less digits than its factorization.

121302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64340.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121302021 is about 11013.7196713917. The cubic root of 121302021 is about 495.0199236956.

Adding to 121302021 its reverse (120203121), we get a palindrome (241505142).

The spelling of 121302021 in words is "one hundred twenty-one million, three hundred two thousand, twenty-one".