121351321 has 32 divisors (see below), whose sum is σ = 161602560. Its totient is φ = 88390656.

The previous prime is 121351313. The next prime is 121351339. The reversal of 121351321 is 123153121.

It is a cyclic number.

It is not a de Polignac number, because 121351321 - 2³ = 121351313 is a prime.

It is a super-2 number, since 2×121351321² = 29452286216890082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121351121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71875 + ... + 73543.

It is an arithmetic number, because the mean of its divisors is an integer number (5050080).

Almost surely, 2^121351321 is an apocalyptic number.

It is an amenable number.

121351321 is a deficient number, since it is larger than the sum of its proper divisors (40251239).

121351321 is a wasteful number, since it uses less digits than its factorization.

121351321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its digits is 180, while the sum is 19.

The square root of 121351321 is about 11015.9575616466. The cubic root of 121351321 is about 495.0869772000.

It can be divided in two parts, 12135 and 1321, that added together give a square (13456 = 116²).

The spelling of 121351321 in words is "one hundred twenty-one million, three hundred fifty-one thousand, three hundred twenty-one".