1220002112021 has 16 divisors (see below), whose sum is σ = 1521067728768. Its totient is φ = 950634662400.

The previous prime is 1220002111981. The next prime is 1220002112051. The reversal of 1220002112021 is 1202112000221.

It is a cyclic number.

It is not a de Polignac number, because 1220002112021 - 2¹⁰ = 1220002110997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220002111987 and 1220002112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002112051) 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, 6398141 + ... + 6586061.

It is an arithmetic number, because the mean of its divisors is an integer number (95066733048).

Almost surely, 2^{1220002112021} is an apocalyptic number.

1220002112021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220002112021 is a deficient number, since it is larger than the sum of its proper divisors (301065616747).

1220002112021 is a wasteful number, since it uses less digits than its factorization.

1220002112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272252.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220002112021 its reverse (1202112000221), we get a palindrome (2422114112242).

The spelling of 1220002112021 in words is "one trillion, two hundred twenty billion, two million, one hundred twelve thousand, twenty-one".