1211120010221 has 8 divisors (see below), whose sum is σ = 1340941558944. Its totient is φ = 1084585083120.

The previous prime is 1211120010193. The next prime is 1211120010263. The reversal of 1211120010221 is 1220100211121.

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

It is not a de Polignac number, because 1211120010221 - 2⁶ = 1211120010157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211120010196 and 1211120010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120010271) 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, 821654630 + ... + 821656103.

It is an arithmetic number, because the mean of its divisors is an integer number (167617694868).

Almost surely, 2^{1211120010221} is an apocalyptic number.

1211120010221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211120010221 is a deficient number, since it is larger than the sum of its proper divisors (129821548723).

1211120010221 is a wasteful number, since it uses less digits than its factorization.

1211120010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643310811.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211120010221 its reverse (1220100211121), we get a palindrome (2431220221342).

The spelling of 1211120010221 in words is "one trillion, two hundred eleven billion, one hundred twenty million, ten thousand, two hundred twenty-one".