1212202020 has 48 divisors (see below), whose sum is σ = 3397238208. Its totient is φ = 322961280.

The previous prime is 1212201997. The next prime is 1212202031. The reversal of 1212202020 is 202022121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1212201987 and 1212202005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62307 + ... + 79413.

It is an arithmetic number, because the mean of its divisors is an integer number (70775796).

Almost surely, 2^1212202020 is an apocalyptic number.

1212202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212202020 is an abundant number, since it is smaller than the sum of its proper divisors (2185036188).

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

1212202020 is a wasteful number, since it uses less digits than its factorization.

1212202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18300 (or 18298 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1212202020 is about 34816.6916866034. The cubic root of 1212202020 is about 1066.2482575549.

Adding to 1212202020 its reverse (202022121), we get a palindrome (1414224141).

The spelling of 1212202020 in words is "one billion, two hundred twelve million, two hundred two thousand, twenty".