20301221000 has 32 divisors (see below), whose sum is σ = 47504859480. Its totient is φ = 8120488000.

The previous prime is 20301220993. The next prime is 20301221011. The reversal of 20301221000 is 12210302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3764804164 + 16536416836 = 61358^2 + 128594^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10149611 + ... + 10151610.

Almost surely, 2^20301221000 is an apocalyptic number.

20301221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20301221000 is an abundant number, since it is smaller than the sum of its proper divisors (27203638480).

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

20301221000 is a wasteful number, since it uses less digits than its factorization.

20301221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20301242 (or 20301228 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20301221000 its reverse (12210302), we get a palindrome (20313431302).

The spelling of 20301221000 in words is "twenty billion, three hundred one million, two hundred twenty-one thousand".