1220200002021 has 128 divisors (see below), whose sum is σ = 2252888064000. Its totient is φ = 566902748160.

The previous prime is 1220200002011. The next prime is 1220200002067. The reversal of 1220200002021 is 1202000020221.

It is not a de Polignac number, because 1220200002021 - 2⁶ = 1220200001957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220200001988 and 1220200002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220200002001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26532555 + ... + 26578503.

It is an arithmetic number, because the mean of its divisors is an integer number (17600688000).

Almost surely, 2^{1220200002021} is an apocalyptic number.

1220200002021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220200002021 is a deficient number, since it is larger than the sum of its proper divisors (1032688061979).

1220200002021 is a wasteful number, since it uses less digits than its factorization.

1220200002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46259.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1220200002021 its reverse (1202000020221), we get a palindrome (2422200022242).

It can be divided in two parts, 1 and 220200002021, that added together give a palindrome (220200002022).

The spelling of 1220200002021 in words is "one trillion, two hundred twenty billion, two hundred million, two thousand, twenty-one".