1221010002099 has 48 divisors (see below), whose sum is σ = 1907019578880. Its totient is φ = 750189211200.

The previous prime is 1221010002067. The next prime is 1221010002143. The reversal of 1221010002099 is 9902000101221.

It is not a de Polignac number, because 1221010002099 - 2⁵ = 1221010002067 is a prime.

It is a super-3 number, since 3×1221010002099³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221010052099) 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 47 ways as a sum of consecutive naturals, for example, 45230884 + ... + 45257870.

It is an arithmetic number, because the mean of its divisors is an integer number (39729574560).

Almost surely, 2^{1221010002099} is an apocalyptic number.

1221010002099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1221010002099 is a deficient number, since it is larger than the sum of its proper divisors (686009576781).

1221010002099 is a wasteful number, since it uses less digits than its factorization.

1221010002099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34200 (or 34197 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 1221010002099 in words is "one trillion, two hundred twenty-one billion, ten million, two thousand, ninety-nine".