1201210022221 has 16 divisors (see below), whose sum is σ = 1357746076800. Its totient is φ = 1052682523200.

The previous prime is 1201210022189. The next prime is 1201210022227. The reversal of 1201210022221 is 1222200121021.

It is a happy number.

It is not a de Polignac number, because 1201210022221 - 2⁵ = 1201210022189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201210022195 and 1201210022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201210022227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2782506 + ... + 3185083.

It is an arithmetic number, because the mean of its divisors is an integer number (84859129800).

Almost surely, 2^{1201210022221} is an apocalyptic number.

1201210022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201210022221 is a deficient number, since it is larger than the sum of its proper divisors (156536054579).

1201210022221 is a wasteful number, since it uses less digits than its factorization.

1201210022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968260.

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

Adding to 1201210022221 its reverse (1222200121021), we get a palindrome (2423410143242).

The spelling of 1201210022221 in words is "one trillion, two hundred one billion, two hundred ten million, twenty-two thousand, two hundred twenty-one".