1221002101019 has 8 divisors (see below), whose sum is σ = 1261159256448. Its totient is φ = 1180893070080.

The previous prime is 1221002100907. The next prime is 1221002101043. The reversal of 1221002101019 is 9101012001221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221002101019 - 2³² = 1216707133723 is a prime.

It is a super-2 number, since 2×1221002101019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221002101219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11979542 + ... + 12081035.

It is an arithmetic number, because the mean of its divisors is an integer number (157644907056).

Almost surely, 2^{1221002101019} is an apocalyptic number.

1221002101019 is a deficient number, since it is larger than the sum of its proper divisors (40157155429).

1221002101019 is a wasteful number, since it uses less digits than its factorization.

1221002101019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24062245.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1221002101019 in words is "one trillion, two hundred twenty-one billion, two million, one hundred one thousand, nineteen".