1221040175630 has 64 divisors (see below), whose sum is σ = 2404262995200. Its totient is φ = 442796390400.

The previous prime is 1221040175617. The next prime is 1221040175633. The reversal of 1221040175630 is 365710401221.

It is a super-2 number, since 2×1221040175630² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221040175633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117098477 + ... + 117108903.

It is an arithmetic number, because the mean of its divisors is an integer number (37566609300).

Almost surely, 2^{1221040175630} is an apocalyptic number.

1221040175630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221040175630 is a deficient number, since it is larger than the sum of its proper divisors (1183222819570).

1221040175630 is a wasteful number, since it uses less digits than its factorization.

1221040175630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 1221040175630 its reverse (365710401221), we get a palindrome (1586750576851).

The spelling of 1221040175630 in words is "one trillion, two hundred twenty-one billion, forty million, one hundred seventy-five thousand, six hundred thirty".