121953730 has 8 divisors (see below), whose sum is σ = 219516732. Its totient is φ = 48781488.

The previous prime is 121953709. The next prime is 121953743. The reversal of 121953730 is 37359121.

It can be written as a sum of positive squares in 2 ways, for example, as 116877721 + 5076009 = 10811^2 + 2253^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 121953692 and 121953701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6097677 + ... + 6097696.

Almost surely, 2^121953730 is an apocalyptic number.

121953730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121953730 is a deficient number, since it is larger than the sum of its proper divisors (97563002).

121953730 is a wasteful number, since it uses less digits than its factorization.

121953730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12195380.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 121953730 is about 11043.2662740695. The cubic root of 121953730 is about 495.9048578567.

The spelling of 121953730 in words is "one hundred twenty-one million, nine hundred fifty-three thousand, seven hundred thirty".