1220002022021 has 8 divisors (see below), whose sum is σ = 1248570696384. Its totient is φ = 1191442281120.

The previous prime is 1220002021993. The next prime is 1220002022027. The reversal of 1220002022021 is 1202202000221.

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 1220002022021 - 2¹⁸ = 1220001759877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220002021987 and 1220002022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002022027) 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, 1956641 + ... + 2503686.

It is an arithmetic number, because the mean of its divisors is an integer number (156071337048).

Almost surely, 2^{1220002022021} is an apocalyptic number.

It is an amenable number.

1220002022021 is a deficient number, since it is larger than the sum of its proper divisors (28568674363).

1220002022021 is an equidigital number, since it uses as much as digits as its factorization.

1220002022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466731.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1220002022021 its reverse (1202202000221), we get a palindrome (2422204022242).

The spelling of 1220002022021 in words is "one trillion, two hundred twenty billion, two million, twenty-two thousand, twenty-one".