21110697000 has 192 divisors, whose sum is σ = 72525782160. Its totient is φ = 5537088000.

The previous prime is 21110696911. The next prime is 21110697011. The reversal of 21110697000 is 79601112.

It can be written as a sum of positive squares in 8 ways, for example, as 258759396 + 20851937604 = 16086^2 + 144402^2 .

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, 529774 + ... + 568226.

Almost surely, 2^21110697000 is an apocalyptic number.

21110697000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110697000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36262891080).

21110697000 is an abundant number, since it is smaller than the sum of its proper divisors (51415085160).

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

21110697000 is a wasteful number, since it uses less digits than its factorization.

21110697000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38541 (or 38524 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The spelling of 21110697000 in words is "twenty-one billion, one hundred ten million, six hundred ninety-seven thousand".