1212101028 has 36 divisors (see below), whose sum is σ = 3135180048. Its totient is φ = 394637040.

The previous prime is 1212101027. The next prime is 1212101047. The reversal of 1212101028 is 8201012121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1212101028.

It is not an unprimeable number, because it can be changed into a prime (1212101021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389958 + ... + 393053.

Almost surely, 2^1212101028 is an apocalyptic number.

1212101028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1212101028 is an abundant number, since it is smaller than the sum of its proper divisors (1923079020).

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

1212101028 is a wasteful number, since it uses less digits than its factorization.

1212101028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783064 (or 783059 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1212101028 is about 34815.2413175609. The cubic root of 1212101028 is about 1066.2186460070.

Adding to 1212101028 its reverse (8201012121), we get a palindrome (9413113149).

The spelling of 1212101028 in words is "one billion, two hundred twelve million, one hundred one thousand, twenty-eight".