20021230321312 has 48 divisors (see below), whose sum is σ = 43092220141152. Its totient is φ = 9081071883520.

The previous prime is 20021230321303. The next prime is 20021230321327. The reversal of 20021230321312 is 21312303212002.

It is a super-2 number, since 2×20021230321312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 60733363 + ... + 61062130.

It is an arithmetic number, because the mean of its divisors is an integer number (897754586274).

Almost surely, 2^{20021230321312} is an apocalyptic number.

20021230321312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021230321312 is an abundant number, since it is smaller than the sum of its proper divisors (23070989819840).

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

20021230321312 is a wasteful number, since it uses less digits than its factorization.

20021230321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121795981 (or 121795973 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20021230321312 its reverse (21312303212002), we get a palindrome (41333533533314).

The spelling of 20021230321312 in words is "twenty trillion, twenty-one billion, two hundred thirty million, three hundred twenty-one thousand, three hundred twelve".