1212210010000 has 100 divisors (see below), whose sum is σ = 3201689368944. Its totient is φ = 440803600000.

The previous prime is 1212210009971. The next prime is 1212210010021. The reversal of 1212210010000 is 100122121.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5400046 + ... + 5620045.

Almost surely, 2^{1212210010000} is an apocalyptic number.

1212210010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212210010000 is an abundant number, since it is smaller than the sum of its proper divisors (1989479358944).

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

1212210010000 is a wasteful number, since it uses less digits than its factorization.

1212210010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020130 (or 11020109 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1212210010000 its reverse (100122121), we get a palindrome (1212310132121).

The spelling of 1212210010000 in words is "one trillion, two hundred twelve billion, two hundred ten million, ten thousand".