121263638 has 8 divisors (see below), whose sum is σ = 182078760. Its totient is φ = 60570720.

The previous prime is 121263631. The next prime is 121263673. The reversal of 121263638 is 836362121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121263631) 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, 28028 + ... + 32063.

It is an arithmetic number, because the mean of its divisors is an integer number (22759845).

Almost surely, 2^121263638 is an apocalyptic number.

121263638 is a deficient number, since it is larger than the sum of its proper divisors (60815122).

121263638 is a wasteful number, since it uses less digits than its factorization.

121263638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61102.

The product of its digits is 10368, while the sum is 32.

The square root of 121263638 is about 11011.9770250396. The cubic root of 121263638 is about 494.9677059502.

The spelling of 121263638 in words is "one hundred twenty-one million, two hundred sixty-three thousand, six hundred thirty-eight".