121263819 has 8 divisors (see below), whose sum is σ = 167260560. Its totient is φ = 78054816.

The previous prime is 121263809. The next prime is 121263823. The reversal of 121263819 is 918362121.

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

It is not a de Polignac number, because 121263819 - 2¹³ = 121255627 is a prime.

It is a super-2 number, since 2×121263819² = 29409827596929522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121263819.

It is not an unprimeable number, because it can be changed into a prime (121263809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696832 + ... + 697005.

It is an arithmetic number, because the mean of its divisors is an integer number (20907570).

Almost surely, 2^121263819 is an apocalyptic number.

121263819 is a deficient number, since it is larger than the sum of its proper divisors (45996741).

121263819 is a wasteful number, since it uses less digits than its factorization.

121263819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393869.

The product of its digits is 5184, while the sum is 33.

The square root of 121263819 is about 11011.9852433610. The cubic root of 121263819 is about 494.9679522156.

The spelling of 121263819 in words is "one hundred twenty-one million, two hundred sixty-three thousand, eight hundred nineteen".