1211101001400 has 96 divisors (see below), whose sum is σ = 3754582012800. Its totient is φ = 322945737600.

The previous prime is 1211101001399. The next prime is 1211101001459. The reversal of 1211101001400 is 41001011121.

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, 23277415 + ... + 23329385.

It is an arithmetic number, because the mean of its divisors is an integer number (39110229300).

Almost surely, 2^{1211101001400} is an apocalyptic number.

1211101001400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211101001400 is an abundant number, since it is smaller than the sum of its proper divisors (2543481011400).

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

1211101001400 is a wasteful number, since it uses less digits than its factorization.

1211101001400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90829 (or 90820 counting only the distinct ones).

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

Adding to 1211101001400 its reverse (41001011121), we get a palindrome (1252102012521).

The spelling of 1211101001400 in words is "one trillion, two hundred eleven billion, one hundred one million, one thousand, four hundred".