1210222212221 has 8 divisors (see below), whose sum is σ = 1320346907424. Its totient is φ = 1100114932720.

The previous prime is 1210222212197. The next prime is 1210222212223. The reversal of 1210222212221 is 1222122220121.

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 1210222212221 - 2²² = 1210218017917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210222212193 and 1210222212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210222212223) 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, 4208411 + ... + 4486776.

It is an arithmetic number, because the mean of its divisors is an integer number (165043363428).

Almost surely, 2^{1210222212221} is an apocalyptic number.

1210222212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210222212221 is a deficient number, since it is larger than the sum of its proper divisors (110124695203).

1210222212221 is a wasteful number, since it uses less digits than its factorization.

1210222212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707851.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1210222212221 its reverse (1222122220121), we get a palindrome (2432344432342).

The spelling of 1210222212221 in words is "one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".