121900646 has 8 divisors (see below), whose sum is σ = 208972560. Its totient is φ = 52243128.

The previous prime is 121900633. The next prime is 121900663. The reversal of 121900646 is 646009121.

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

It is a congruent number.

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, 4353581 + ... + 4353608.

It is an arithmetic number, because the mean of its divisors is an integer number (26121570).

Almost surely, 2^121900646 is an apocalyptic number.

121900646 is a deficient number, since it is larger than the sum of its proper divisors (87071914).

121900646 is an equidigital number, since it uses as much as digits as its factorization.

121900646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707198.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 121900646 is about 11040.8625568839. The cubic root of 121900646 is about 495.8328949521.

Adding to 121900646 its reverse (646009121), we get a palindrome (767909767).

The spelling of 121900646 in words is "one hundred twenty-one million, nine hundred thousand, six hundred forty-six".