2311111132400 has 120 divisors (see below), whose sum is σ = 6369780831744. Its totient is φ = 789367852800.

The previous prime is 2311111132387. The next prime is 2311111132409. The reversal of 2311111132400 is 42311111132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311111132409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 832796 + ... + 2305595.

Almost surely, 2^{2311111132400} is an apocalyptic number.

2311111132400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311111132400 is an abundant number, since it is smaller than the sum of its proper divisors (4058669699344).

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

2311111132400 is a wasteful number, since it uses less digits than its factorization.

2311111132400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138679 (or 3138668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2311111132400 its reverse (42311111132), we get a palindrome (2353422243532).

The spelling of 2311111132400 in words is "two trillion, three hundred eleven billion, one hundred eleven million, one hundred thirty-two thousand, four hundred".