1210021200221 has 8 divisors (see below), whose sum is σ = 1214354468544. Its totient is φ = 1205688337920.

The previous prime is 1210021200161. The next prime is 1210021200253. The reversal of 1210021200221 is 1220021200121.

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 1210021200221 - 2¹⁰ = 1210021199197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210021200196 and 1210021200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210021200281) 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, 6677405 + ... + 6856221.

It is an arithmetic number, because the mean of its divisors is an integer number (151794308568).

Almost surely, 2^{1210021200221} is an apocalyptic number.

It is an amenable number.

1210021200221 is a deficient number, since it is larger than the sum of its proper divisors (4333268323).

1210021200221 is a wasteful number, since it uses less digits than its factorization.

1210021200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203011.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1210021200221 its reverse (1220021200121), we get a palindrome (2430042400342).

The spelling of 1210021200221 in words is "one trillion, two hundred ten billion, twenty-one million, two hundred thousand, two hundred twenty-one".