21111248279496 has 128 divisors (see below), whose sum is σ = 57688453186560. Its totient is φ = 6409146163200.

The previous prime is 21111248279483. The next prime is 21111248279497. The reversal of 21111248279496 is 69497284211112.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21111248279497) 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, 341680126 + ... + 341741906.

It is an arithmetic number, because the mean of its divisors is an integer number (450691040520).

Almost surely, 2^{21111248279496} 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 21111248279496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28844226593280).

21111248279496 is an abundant number, since it is smaller than the sum of its proper divisors (36577204907064).

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

21111248279496 is a wasteful number, since it uses less digits than its factorization.

21111248279496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88855 (or 88851 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The spelling of 21111248279496 in words is "twenty-one trillion, one hundred eleven billion, two hundred forty-eight million, two hundred seventy-nine thousand, four hundred ninety-six".