1200220102021 has 4 divisors (see below), whose sum is σ = 1200248513632. Its totient is φ = 1200191690412.

The previous prime is 1200220101989. The next prime is 1200220102043. The reversal of 1200220102021 is 1202010220021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200220102021 - 2⁵ = 1200220101989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200220101992 and 1200220102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200220102091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14142345 + ... + 14226958.

It is an arithmetic number, because the mean of its divisors is an integer number (300062128408).

Almost surely, 2^{1200220102021} is an apocalyptic number.

It is an amenable number.

1200220102021 is a deficient number, since it is larger than the sum of its proper divisors (28411611).

1200220102021 is an equidigital number, since it uses as much as digits as its factorization.

1200220102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28411610.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200220102021 its reverse (1202010220021), we get a palindrome (2402230322042).

The spelling of 1200220102021 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred two thousand, twenty-one".