121820410 has 8 divisors (see below), whose sum is σ = 219276756. Its totient is φ = 48728160.

The previous prime is 121820401. The next prime is 121820411. The reversal of 121820410 is 14028121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 121815369 + 5041 = 11037^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121820411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6091011 + ... + 6091030.

Almost surely, 2^121820410 is an apocalyptic number.

121820410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121820410 is a deficient number, since it is larger than the sum of its proper divisors (97456346).

121820410 is a wasteful number, since it uses less digits than its factorization.

121820410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12182048.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 121820410 is about 11037.2283658534. The cubic root of 121820410 is about 495.7240839892.

Adding to 121820410 its reverse (14028121), we get a palindrome (135848531).

The spelling of 121820410 in words is "one hundred twenty-one million, eight hundred twenty thousand, four hundred ten".