1220001212211 has 8 divisors (see below), whose sum is σ = 1627365535440. Its totient is φ = 812985515232.

The previous prime is 1220001212191. The next prime is 1220001212233. The reversal of 1220001212211 is 1122121000221.

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

It is not a de Polignac number, because 1220001212211 - 2⁹ = 1220001211699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220001912211) 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, 87148396 + ... + 87162393.

It is an arithmetic number, because the mean of its divisors is an integer number (203420691930).

Almost surely, 2^{1220001212211} is an apocalyptic number.

1220001212211 is a deficient number, since it is larger than the sum of its proper divisors (407364323229).

1220001212211 is a wasteful number, since it uses less digits than its factorization.

1220001212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174313125.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1220001212211 its reverse (1122121000221), we get a palindrome (2342122212432).

The spelling of 1220001212211 in words is "one trillion, two hundred twenty billion, one million, two hundred twelve thousand, two hundred eleven".