1220200011021 has 64 divisors (see below), whose sum is σ = 1739255040000. Its totient is φ = 759639589632.

The previous prime is 1220200011013. The next prime is 1220200011071. The reversal of 1220200011021 is 1201100020221.

It is not a de Polignac number, because 1220200011021 - 2³ = 1220200011013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220200010988 and 1220200011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220200011071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 367639200 + ... + 367642518.

It is an arithmetic number, because the mean of its divisors is an integer number (27175860000).

Almost surely, 2^{1220200011021} is an apocalyptic number.

It is an amenable number.

1220200011021 is a deficient number, since it is larger than the sum of its proper divisors (519055028979).

1220200011021 is a wasteful number, since it uses less digits than its factorization.

1220200011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1220200011021 its reverse (1201100020221), we get a palindrome (2421300031242).

The spelling of 1220200011021 in words is "one trillion, two hundred twenty billion, two hundred million, eleven thousand, twenty-one".