10221111992 has 64 divisors (see below), whose sum is σ = 23717803200. Its totient is φ = 4021125120.

The previous prime is 10221111961. The next prime is 10221112003. The reversal of 10221111992 is 29911112201.

It is a super-3 number, since 3×10221111992³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 92984 + ... + 170552.

It is an arithmetic number, because the mean of its divisors is an integer number (370590675).

Almost surely, 2^10221111992 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 10221111992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11858901600).

10221111992 is an abundant number, since it is smaller than the sum of its proper divisors (13496691208).

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

10221111992 is a wasteful number, since it uses less digits than its factorization.

10221111992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77776 (or 77772 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 10221111992 in words is "ten billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred ninety-two".