2111961397504 has 144 divisors (see below), whose sum is σ = 4945756587520. Its totient is φ = 881422663680.

The previous prime is 2111961397487. The next prime is 2111961397517. The reversal of 2111961397504 is 4057931691112.

It is a super-3 number, since 3×2111961397504³ (a number of 38 digits) contains 333 as substring.

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, 10232284 + ... + 10436644.

Almost surely, 2^{2111961397504} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111961397504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472878293760).

2111961397504 is an abundant number, since it is smaller than the sum of its proper divisors (2833795190016).

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

2111961397504 is an equidigital number, since it uses as much as digits as its factorization.

2111961397504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204536 (or 204522 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 2111961397504 in words is "two trillion, one hundred eleven billion, nine hundred sixty-one million, three hundred ninety-seven thousand, five hundred four".