1211000222120 has 64 divisors (see below), whose sum is σ = 2936678976000. Its totient is φ = 446783148288.

The previous prime is 1211000222093. The next prime is 1211000222167. The reversal of 1211000222120 is 212220001121.

It is a super-3 number, since 3×1211000222120³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211000222095 and 1211000222104.

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, 270200 + ... + 1579559.

It is an arithmetic number, because the mean of its divisors is an integer number (45885609000).

Almost surely, 2^{1211000222120} is an apocalyptic number.

1211000222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211000222120 is an abundant number, since it is smaller than the sum of its proper divisors (1725678753880).

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

1211000222120 is a wasteful number, since it uses less digits than its factorization.

1211000222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851042 (or 1851038 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1211000222120 its reverse (212220001121), we get a palindrome (1423220223241).

The spelling of 1211000222120 in words is "one trillion, two hundred eleven billion, two hundred twenty-two thousand, one hundred twenty".