1212102020 has 36 divisors (see below), whose sum is σ = 2564923620. Its totient is φ = 481152768.

The previous prime is 1212102019. The next prime is 1212102041. The reversal of 1212102020 is 202012121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 8844676 + 1203257344 = 2974^2 + 34688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212101992 and 1212102010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373766 + ... + 376994.

Almost surely, 2^1212102020 is an apocalyptic number.

1212102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212102020 is an abundant number, since it is smaller than the sum of its proper divisors (1352821600).

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

1212102020 is a wasteful number, since it uses less digits than its factorization.

1212102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3373 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212102020 is about 34815.2555641920. The cubic root of 1212102020 is about 1066.2189368762.

Adding to 1212102020 its reverse (202012121), we get a palindrome (1414114141).

The spelling of 1212102020 in words is "one billion, two hundred twelve million, one hundred two thousand, twenty".