1211213020120 has 32 divisors (see below), whose sum is σ = 2752211772720. Its totient is φ = 479688323200.

The previous prime is 1211213020093. The next prime is 1211213020123. The reversal of 1211213020120 is 210203121121.

It is a junction number, because it is equal to n+sod(n) for n = 1211213020094 and 1211213020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211213020123) 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, 149898562 + ... + 149906641.

Almost surely, 2^{1211213020120} is an apocalyptic number.

1211213020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211213020120 is an abundant number, since it is smaller than the sum of its proper divisors (1540998752600).

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

1211213020120 is a wasteful number, since it uses less digits than its factorization.

1211213020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299805315 (or 299805311 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211213020120 its reverse (210203121121), we get a palindrome (1421416141241).

The spelling of 1211213020120 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, twenty thousand, one hundred twenty".