1200022020101 has 4 divisors (see below), whose sum is σ = 1200166766304. Its totient is φ = 1199877273900.

The previous prime is 1200022020031. The next prime is 1200022020133. The reversal of 1200022020101 is 1010202200021.

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 a de Polignac number, because none of the positive numbers 2^k-1200022020101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200022020151) 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, 72360665 + ... + 72377246.

It is an arithmetic number, because the mean of its divisors is an integer number (300041691576).

Almost surely, 2^{1200022020101} is an apocalyptic number.

It is an amenable number.

1200022020101 is a deficient number, since it is larger than the sum of its proper divisors (144746203).

1200022020101 is an equidigital number, since it uses as much as digits as its factorization.

1200022020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144746202.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200022020101 its reverse (1010202200021), we get a palindrome (2210224220122).

The spelling of 1200022020101 in words is "one trillion, two hundred billion, twenty-two million, twenty thousand, one hundred one".