1202020001221 has 8 divisors (see below), whose sum is σ = 1322025272064. Its totient is φ = 1085949329520.

The previous prime is 1202020001201. The next prime is 1202020001233. The reversal of 1202020001221 is 1221000202021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1202020001221 - 2¹³ = 1202019993029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202020001201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983649145 + ... + 983650366.

It is an arithmetic number, because the mean of its divisors is an integer number (165253159008).

Almost surely, 2^{1202020001221} is an apocalyptic number.

It is an amenable number.

1202020001221 is a deficient number, since it is larger than the sum of its proper divisors (120005270843).

1202020001221 is a wasteful number, since it uses less digits than its factorization.

1202020001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967299571.

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

Adding to 1202020001221 its reverse (1221000202021), we get a palindrome (2423020203242).

The spelling of 1202020001221 in words is "one trillion, two hundred two billion, twenty million, one thousand, two hundred twenty-one".