121213454 has 4 divisors (see below), whose sum is σ = 181820184. Its totient is φ = 60606726.

The previous prime is 121213453. The next prime is 121213471. The reversal of 121213454 is 454312121.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×121213454² = 29385402861220232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30303362 + ... + 30303365.

It is an arithmetic number, because the mean of its divisors is an integer number (45455046).

Almost surely, 2^121213454 is an apocalyptic number.

121213454 is a deficient number, since it is larger than the sum of its proper divisors (60606730).

121213454 is an equidigital number, since it uses as much as digits as its factorization.

121213454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60606729.

The product of its digits is 960, while the sum is 23.

The square root of 121213454 is about 11009.6981793326. The cubic root of 121213454 is about 494.8994170355.

Adding to 121213454 its reverse (454312121), we get a palindrome (575525575).

The spelling of 121213454 in words is "one hundred twenty-one million, two hundred thirteen thousand, four hundred fifty-four".