1212122020 has 24 divisors (see below), whose sum is σ = 2546135424. Its totient is φ = 484719456.

The previous prime is 1212121997. The next prime is 1212122039. The reversal of 1212122020 is 202212121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112927 + ... + 123193.

It is an arithmetic number, because the mean of its divisors is an integer number (106088976).

Almost surely, 2^1212122020 is an apocalyptic number.

1212122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212122020 is an abundant number, since it is smaller than the sum of its proper divisors (1334013404).

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

1212122020 is a wasteful number, since it uses less digits than its factorization.

1212122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16179 (or 16177 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1212122020 is about 34815.5427934134. The cubic root of 1212122020 is about 1066.2248011409.

Adding to 1212122020 its reverse (202212121), we get a palindrome (1414334141).

The spelling of 1212122020 in words is "one billion, two hundred twelve million, one hundred twenty-two thousand, twenty".