1212402020 has 24 divisors (see below), whose sum is σ = 2569843584. Its totient is φ = 480427616.

The previous prime is 1212402011. The next prime is 1212402029. The reversal of 1212402020 is 202042121.

It is an interprime number because it is at equal distance from previous prime (1212402011) and next prime (1212402029).

It is a junction number, because it is equal to n+sod(n) for n = 1212401986 and 1212402004.

It is not an unprimeable number, because it can be changed into a prime (1212402029) 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, 281132 + ... + 285411.

It is an arithmetic number, because the mean of its divisors is an integer number (107076816).

Almost surely, 2^1212402020 is an apocalyptic number.

1212402020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212402020 is an abundant number, since it is smaller than the sum of its proper divisors (1357441564).

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

1212402020 is a wasteful number, since it uses less digits than its factorization.

1212402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566659 (or 566657 counting only the distinct ones).

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

The square root of 1212402020 is about 34819.5637537290. The cubic root of 1212402020 is about 1066.3068940751.

Adding to 1212402020 its reverse (202042121), we get a palindrome (1414444141).

The spelling of 1212402020 in words is "one billion, two hundred twelve million, four hundred two thousand, twenty".