1220012021097 has 16 divisors (see below), whose sum is σ = 1865729256960. Its totient is φ = 787104529200.

The previous prime is 1220012020991. The next prime is 1220012021099. The reversal of 1220012021097 is 7901202100221.

It is not a de Polignac number, because 1220012021097 - 2¹¹ = 1220012019049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1220012021097.

It is not an unprimeable number, because it can be changed into a prime (1220012021099) 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 15 ways as a sum of consecutive naturals, for example, 728799654 + ... + 728801327.

It is an arithmetic number, because the mean of its divisors is an integer number (116608078560).

Almost surely, 2^{1220012021097} is an apocalyptic number.

It is an amenable number.

1220012021097 is a deficient number, since it is larger than the sum of its proper divisors (645717235863).

1220012021097 is a wasteful number, since it uses less digits than its factorization.

1220012021097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457601021 (or 1457601015 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The spelling of 1220012021097 in words is "one trillion, two hundred twenty billion, twelve million, twenty-one thousand, ninety-seven".