1212211010028 has 12 divisors (see below), whose sum is σ = 2828492356760. Its totient is φ = 404070336672.

The previous prime is 1212211010027. The next prime is 1212211010069. The reversal of 1212211010028 is 8200101122121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1212211009986 and 1212211010013.

It is not an unprimeable number, because it can be changed into a prime (1212211010027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50508792073 + ... + 50508792096.

Almost surely, 2^{1212211010028} is an apocalyptic number.

It is an amenable number.

1212211010028 is an abundant number, since it is smaller than the sum of its proper divisors (1616281346732).

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

1212211010028 is a wasteful number, since it uses less digits than its factorization.

1212211010028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101017584176 (or 101017584174 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 1212211010028 its reverse (8200101122121), we get a palindrome (9412312132149).

The spelling of 1212211010028 in words is "one trillion, two hundred twelve billion, two hundred eleven million, ten thousand, twenty-eight".