1201222210021 has 4 divisors (see below), whose sum is σ = 1210391845344. Its totient is φ = 1192052574700.

The previous prime is 1201222209989. The next prime is 1201222210063. The reversal of 1201222210021 is 1200122221021.

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 1201222210021 - 2⁵ = 1201222209989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201222209977 and 1201222210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201222250021) 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, 4584817465 + ... + 4584817726.

It is an arithmetic number, because the mean of its divisors is an integer number (302597961336).

Almost surely, 2^{1201222210021} is an apocalyptic number.

It is an amenable number.

1201222210021 is a deficient number, since it is larger than the sum of its proper divisors (9169635323).

1201222210021 is an equidigital number, since it uses as much as digits as its factorization.

1201222210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9169635322.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1201222210021 its reverse (1200122221021), we get a palindrome (2401344431042).

The spelling of 1201222210021 in words is "one trillion, two hundred one billion, two hundred twenty-two million, two hundred ten thousand, twenty-one".