1212222020 has 24 divisors (see below), whose sum is σ = 2553864768. Its totient is φ = 483327200.

The previous prime is 1212222019. The next prime is 1212222023. The reversal of 1212222020 is 202222121.

It is a junction number, because it is equal to n+sod(n) for n = 1212221986 and 1212222004.

It is not an unprimeable number, because it can be changed into a prime (1212222023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91226 + ... + 103665.

It is an arithmetic number, because the mean of its divisors is an integer number (106411032).

Almost surely, 2^1212222020 is an apocalyptic number.

1212222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212222020 is an abundant number, since it is smaller than the sum of its proper divisors (1341642748).

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

1212222020 is a wasteful number, since it uses less digits than its factorization.

1212222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195211 (or 195209 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1212222020 is about 34816.9789039773. The cubic root of 1212222020 is about 1066.2541214971.

Adding to 1212222020 its reverse (202222121), we get a palindrome (1414444141).

The spelling of 1212222020 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, twenty".