1211621011104 has 48 divisors (see below), whose sum is σ = 3634863035328. Its totient is φ = 346177431552.

The previous prime is 1211621011021. The next prime is 1211621011169. The reversal of 1211621011104 is 4011101261121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901503057 + ... + 901504400.

It is an arithmetic number, because the mean of its divisors is an integer number (75726313236).

Almost surely, 2^{1211621011104} is an apocalyptic number.

1211621011104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1211621011104 is an abundant number, since it is smaller than the sum of its proper divisors (2423242024224).

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

1211621011104 is a wasteful number, since it uses less digits than its factorization.

1211621011104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803007477 (or 1803007469 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 1211621011104 its reverse (4011101261121), we get a palindrome (5222722272225).

The spelling of 1211621011104 in words is "one trillion, two hundred eleven billion, six hundred twenty-one million, eleven thousand, one hundred four".