10221771000 has 256 divisors, whose sum is σ = 36552821760. Its totient is φ = 2329689600.

The previous prime is 10221770963. The next prime is 10221771023. The reversal of 10221771000 is 17712201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13502622 + ... + 13503378.

It is an arithmetic number, because the mean of its divisors is an integer number (142784460).

Almost surely, 2^10221771000 is an apocalyptic number.

10221771000 is a gapful number since it is divisible by the number (10) 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 10221771000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18276410880).

10221771000 is an abundant number, since it is smaller than the sum of its proper divisors (26331050760).

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

10221771000 is a wasteful number, since it uses less digits than its factorization.

10221771000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 21.

The spelling of 10221771000 in words is "ten billion, two hundred twenty-one million, seven hundred seventy-one thousand".