1213012021120 has 32 divisors (see below), whose sum is σ = 2899856864520. Its totient is φ = 485204808192.

The previous prime is 1213012021061. The next prime is 1213012021127. The reversal of 1213012021120 is 211202103121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1213012021094 and 1213012021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213012021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947665002 + ... + 947666281.

Almost surely, 2^{1213012021120} is an apocalyptic number.

1213012021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213012021120 is an abundant number, since it is smaller than the sum of its proper divisors (1686844843400).

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

1213012021120 is an equidigital number, since it uses as much as digits as its factorization.

1213012021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895331302 (or 1895331290 counting only the distinct ones).

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

Adding to 1213012021120 its reverse (211202103121), we get a palindrome (1424214124241).

The spelling of 1213012021120 in words is "one trillion, two hundred thirteen billion, twelve million, twenty-one thousand, one hundred twenty".