1211111022320 has 40 divisors (see below), whose sum is σ = 2843171331936. Its totient is φ = 479741061888.

The previous prime is 1211111022311. The next prime is 1211111022349. The reversal of 1211111022320 is 232201111121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73481507 + ... + 73497986.

Almost surely, 2^{1211111022320} is an apocalyptic number.

1211111022320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211111022320 is an abundant number, since it is smaller than the sum of its proper divisors (1632060309616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211111022320 is a wasteful number, since it uses less digits than its factorization.

1211111022320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146979609 (or 146979603 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211111022320 its reverse (232201111121), we get a palindrome (1443312133441).

The spelling of 1211111022320 in words is "one trillion, two hundred eleven billion, one hundred eleven million, twenty-two thousand, three hundred twenty".