1212211122020 has 12 divisors (see below), whose sum is σ = 2545643356284. Its totient is φ = 484884448800.

The previous prime is 1212211122019. The next prime is 1212211122053. The reversal of 1212211122020 is 202211122121.

It can be written as a sum of positive squares in 2 ways, for example, as 713345781604 + 498865340416 = 844598^2 + 706304^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212211122020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30305278031 + ... + 30305278070.

It is an arithmetic number, because the mean of its divisors is an integer number (212136946357).

Almost surely, 2^{1212211122020} is an apocalyptic number.

1212211122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212211122020 is an abundant number, since it is smaller than the sum of its proper divisors (1333432234264).

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

1212211122020 is a wasteful number, since it uses less digits than its factorization.

1212211122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610556110 (or 60610556108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212211122020 its reverse (202211122121), we get a palindrome (1414422244141).

The spelling of 1212211122020 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, twenty".