1220100210999 has 24 divisors (see below), whose sum is σ = 1866347460432. Its totient is φ = 765425137920.

The previous prime is 1220100210977. The next prime is 1220100211019. The reversal of 1220100210999 is 9990120010221.

It is not a de Polignac number, because 1220100210999 - 2²¹ = 1220098113847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220100210499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256357 + ... + 1583009.

It is an arithmetic number, because the mean of its divisors is an integer number (77764477518).

Almost surely, 2^{1220100210999} is an apocalyptic number.

1220100210999 is a deficient number, since it is larger than the sum of its proper divisors (646247249433).

1220100210999 is a wasteful number, since it uses less digits than its factorization.

1220100210999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332687 (or 1332684 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 1220100210999 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred ten thousand, nine hundred ninety-nine".