1000221201992 has 32 divisors (see below), whose sum is σ = 1891019934720. Its totient is φ = 495952712640.

The previous prime is 1000221201989. The next prime is 1000221201997. The reversal of 1000221201992 is 2991021220001.

It is a super-3 number, since 3×1000221201992³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1000221201997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2086142 + ... + 2520402.

It is an arithmetic number, because the mean of its divisors is an integer number (59094372960).

Almost surely, 2^{1000221201992} is an apocalyptic number.

It is an amenable number.

1000221201992 is a deficient number, since it is larger than the sum of its proper divisors (890798732728).

1000221201992 is a wasteful number, since it uses less digits than its factorization.

1000221201992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436661 (or 436657 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

Adding to 1000221201992 its reverse (2991021220001), we get a palindrome (3991242421993).

The spelling of 1000221201992 in words is "one trillion, two hundred twenty-one million, two hundred one thousand, nine hundred ninety-two".