1211220011233 has 8 divisors (see below), whose sum is σ = 1216731622400. Its totient is φ = 1205709115968.

The previous prime is 1211220011203. The next prime is 1211220011257. The reversal of 1211220011233 is 3321100221121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211220011233 is a prime.

It is a super-2 number, since 2×1211220011233² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211220011233.

It is not an unprimeable number, because it can be changed into a prime (1211220011203) 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, 3372328 + ... + 3714166.

It is an arithmetic number, because the mean of its divisors is an integer number (152091452800).

Almost surely, 2^{1211220011233} is an apocalyptic number.

It is an amenable number.

1211220011233 is a deficient number, since it is larger than the sum of its proper divisors (5511611167).

1211220011233 is a wasteful number, since it uses less digits than its factorization.

1211220011233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357951.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211220011233 its reverse (3321100221121), we get a palindrome (4532320232354).

The spelling of 1211220011233 in words is "one trillion, two hundred eleven billion, two hundred twenty million, eleven thousand, two hundred thirty-three".