1212211000900 has 36 divisors (see below), whose sum is σ = 2640977997840. Its totient is φ = 482952580000.

The previous prime is 1212211000823. The next prime is 1212211000901. The reversal of 1212211000900 is 90001122121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1212211000901) 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, 24122530 + ... + 24172729.

It is an arithmetic number, because the mean of its divisors is an integer number (73360499940).

Almost surely, 2^{1212211000900} is an apocalyptic number.

1212211000900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212211000900 is an abundant number, since it is smaller than the sum of its proper divisors (1428766996940).

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

1212211000900 is a wasteful number, since it uses less digits than its factorization.

1212211000900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48295524 (or 48295517 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1212211000900 in words is "one trillion, two hundred twelve billion, two hundred eleven million, nine hundred", and thus it is an aban number.