1220012220021 has 8 divisors (see below), whose sum is σ = 1859066240064. Its totient is φ = 697149840000.

The previous prime is 1220012220017. The next prime is 1220012220059. The reversal of 1220012220021 is 1200222100221.

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

It is not a de Polignac number, because 1220012220021 - 2² = 1220012220017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220012220001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29047909980 + ... + 29047910021.

It is an arithmetic number, because the mean of its divisors is an integer number (232383280008).

Almost surely, 2^{1220012220021} is an apocalyptic number.

It is an amenable number.

1220012220021 is a deficient number, since it is larger than the sum of its proper divisors (639054020043).

1220012220021 is an equidigital number, since it uses as much as digits as its factorization.

1220012220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58095820011.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220012220021 its reverse (1200222100221), we get a palindrome (2420234320242).

The spelling of 1220012220021 in words is "one trillion, two hundred twenty billion, twelve million, two hundred twenty thousand, twenty-one".