121948690 has 32 divisors (see below), whose sum is σ = 225134640. Its totient is φ = 47545344.

The previous prime is 121948621. The next prime is 121948711. The reversal of 121948690 is 96849121.

It can be written as a sum of positive squares in 8 ways, for example, as 44209201 + 77739489 = 6649^2 + 8817^2 .

It is a super-2 number, since 2×121948690² = 29742965985432200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64032 + ... + 65908.

Almost surely, 2^121948690 is an apocalyptic number.

121948690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121948690 is a deficient number, since it is larger than the sum of its proper divisors (103185950).

121948690 is a wasteful number, since it uses less digits than its factorization.

121948690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 121948690 is about 11043.0380783551. The cubic root of 121948690 is about 495.8980263179.

The spelling of 121948690 in words is "one hundred twenty-one million, nine hundred forty-eight thousand, six hundred ninety".