2011521355140 has 96 divisors (see below), whose sum is σ = 6145740066816. Its totient is φ = 487525933440.

The previous prime is 2011521355099. The next prime is 2011521355141. The reversal of 2011521355140 is 415531251102.

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 = 2011521355098 and 2011521355107.

It is not an unprimeable number, because it can be changed into a prime (2011521355141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2441229 + ... + 3159531.

It is an arithmetic number, because the mean of its divisors is an integer number (64018125696).

Almost surely, 2^{2011521355140} is an apocalyptic number.

2011521355140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011521355140 is an abundant number, since it is smaller than the sum of its proper divisors (4134218711676).

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

2011521355140 is a wasteful number, since it uses less digits than its factorization.

2011521355140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722569 (or 722567 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 2011521355140 in words is "two trillion, eleven billion, five hundred twenty-one million, three hundred fifty-five thousand, one hundred forty".