1212102202120 has 16 divisors (see below), whose sum is σ = 2727229954860. Its totient is φ = 484840880832.

The previous prime is 1212102202099. The next prime is 1212102202121. The reversal of 1212102202120 is 212022012121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1114287137604 + 97815064516 = 1055598^2 + 312754^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212102202094 and 1212102202103.

It is not an unprimeable number, because it can be changed into a prime (1212102202121) 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, 15151277487 + ... + 15151277566.

Almost surely, 2^{1212102202120} is an apocalyptic number.

1212102202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212102202120 is an abundant number, since it is smaller than the sum of its proper divisors (1515127752740).

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

1212102202120 is a wasteful number, since it uses less digits than its factorization.

1212102202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302555064 (or 30302555060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212102202120 its reverse (212022012121), we get a palindrome (1424124214241).

The spelling of 1212102202120 in words is "one trillion, two hundred twelve billion, one hundred two million, two hundred two thousand, one hundred twenty".