21101062158 has 96 divisors (see below), whose sum is σ = 50754442752. Its totient is φ = 6282230400.

The previous prime is 21101062141. The next prime is 21101062193. The reversal of 21101062158 is 85126010112.

21101062158 is a `hidden beast` number, since 21 + 1 + 0 + 10 + 621 + 5 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3914341 + ... + 3919727.

It is an arithmetic number, because the mean of its divisors is an integer number (528692112).

Almost surely, 2^21101062158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21101062158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25377221376).

21101062158 is an abundant number, since it is smaller than the sum of its proper divisors (29653380594).

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

21101062158 is a wasteful number, since it uses less digits than its factorization.

21101062158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750 (or 5747 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The spelling of 21101062158 in words is "twenty-one billion, one hundred one million, sixty-two thousand, one hundred fifty-eight".