1212012011100 has 72 divisors (see below), whose sum is σ = 3825550649088. Its totient is φ = 293821092800.

The previous prime is 1212012011029. The next prime is 1212012011117. The reversal of 1212012011100 is 11102102121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183634884 + ... + 183641483.

It is an arithmetic number, because the mean of its divisors is an integer number (53132647904).

Almost surely, 2^{1212012011100} is an apocalyptic number.

1212012011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212012011100 is an abundant number, since it is smaller than the sum of its proper divisors (2613538637988).

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

1212012011100 is a wasteful number, since it uses less digits than its factorization.

1212012011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367276395 (or 367276388 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1212012011100 its reverse (11102102121), we get a palindrome (1223114113221).

The spelling of 1212012011100 in words is "one trillion, two hundred twelve billion, twelve million, eleven thousand, one hundred".