122221648690 has 16 divisors (see below), whose sum is σ = 227585139480. Its totient is φ = 47202843520.

The previous prime is 122221648687. The next prime is 122221648727. The reversal of 122221648690 is 96846122221.

It can be written as a sum of positive squares in 4 ways, for example, as 78611262129 + 43610386561 = 280377^2 + 208831^2 .

It is a super-2 number, since 2×122221648690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210726691 + ... + 210727270.

Almost surely, 2^122221648690 is an apocalyptic number.

122221648690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122221648690 is a deficient number, since it is larger than the sum of its proper divisors (105363490790).

122221648690 is a wasteful number, since it uses less digits than its factorization.

122221648690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421453997.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 122221648690 in words is "one hundred twenty-two billion, two hundred twenty-one million, six hundred forty-eight thousand, six hundred ninety".