1221112000211 has 4 divisors (see below), whose sum is σ = 1224251106000. Its totient is φ = 1217972894424.

The previous prime is 1221112000181. The next prime is 1221112000247. The reversal of 1221112000211 is 1120002111221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1221112000211 - 2¹⁴ = 1221111983827 is a prime.

It is a super-2 number, since 2×1221112000211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221112000261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1569552311 + ... + 1569553088.

It is an arithmetic number, because the mean of its divisors is an integer number (306062776500).

Almost surely, 2^{1221112000211} is an apocalyptic number.

1221112000211 is a deficient number, since it is larger than the sum of its proper divisors (3139105789).

1221112000211 is an equidigital number, since it uses as much as digits as its factorization.

1221112000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139105788.

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

Adding to 1221112000211 its reverse (1120002111221), we get a palindrome (2341114111432).

It can be divided in two parts, 1221 and 112000211, that multiplied together give a palindrome (136752257631).

The spelling of 1221112000211 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred eleven", and thus it is an aban number.