1211001102120 has 64 divisors (see below), whose sum is σ = 3634794576000. Its totient is φ = 322774403328.

The previous prime is 1211001102043. The next prime is 1211001102139. The reversal of 1211001102120 is 212011001121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1211001102096 and 1211001102105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2243380 + ... + 2730339.

It is an arithmetic number, because the mean of its divisors is an integer number (56793665250).

Almost surely, 2^{1211001102120} is an apocalyptic number.

1211001102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211001102120 is an abundant number, since it is smaller than the sum of its proper divisors (2423793473880).

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

1211001102120 is a wasteful number, since it uses less digits than its factorization.

1211001102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975762 (or 4975758 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211001102120 its reverse (212011001121), we get a palindrome (1423012103241).

The spelling of 1211001102120 in words is "one trillion, two hundred eleven billion, one million, one hundred two thousand, one hundred twenty".