2311221542340 has 48 divisors (see below), whose sum is σ = 6471537287040. Its totient is φ = 616314604800.

The previous prime is 2311221542317. The next prime is 2311221542359. The reversal of 2311221542340 is 432451221132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2311221542298 and 2311221542307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3318241 + ... + 3953879.

It is an arithmetic number, because the mean of its divisors is an integer number (134823693480).

Almost surely, 2^{2311221542340} is an apocalyptic number.

2311221542340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311221542340 is an abundant number, since it is smaller than the sum of its proper divisors (4160315744700).

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

2311221542340 is a wasteful number, since it uses less digits than its factorization.

2311221542340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696252 (or 696250 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 2311221542340 its reverse (432451221132), we get a palindrome (2743672763472).

The spelling of 2311221542340 in words is "two trillion, three hundred eleven billion, two hundred twenty-one million, five hundred forty-two thousand, three hundred forty".