1220002222021 has 16 divisors (see below), whose sum is σ = 1346895475200. Its totient is φ = 1095818824000.

The previous prime is 1220002222007. The next prime is 1220002222027. The reversal of 1220002222021 is 1202222000221.

It is a cyclic number.

It is not a de Polignac number, because 1220002222021 - 2¹⁷ = 1220002090949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220002221986 and 1220002222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002222027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614086 + ... + 1678423.

It is an arithmetic number, because the mean of its divisors is an integer number (84180967200).

Almost surely, 2^{1220002222021} is an apocalyptic number.

1220002222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220002222021 is a deficient number, since it is larger than the sum of its proper divisors (126893253179).

1220002222021 is a wasteful number, since it uses less digits than its factorization.

1220002222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293100.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1220002222021 its reverse (1202222000221), we get a palindrome (2422224222242).

The spelling of 1220002222021 in words is "one trillion, two hundred twenty billion, two million, two hundred twenty-two thousand, twenty-one".