20001211320012 has 24 divisors (see below), whose sum is σ = 50259454086576. Its totient is φ = 6154218867648.

The previous prime is 20001211320011. The next prime is 20001211320023. The reversal of 20001211320012 is 21002311210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001211319973 and 20001211320000.

It is not an unprimeable number, because it can be changed into a prime (20001211320011) 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, 64106446383 + ... + 64106446694.

It is an arithmetic number, because the mean of its divisors is an integer number (2094143920274).

Almost surely, 2^{20001211320012} is an apocalyptic number.

It is an amenable number.

20001211320012 is an abundant number, since it is smaller than the sum of its proper divisors (30258242766564).

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

20001211320012 is a wasteful number, since it uses less digits than its factorization.

20001211320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128212893097 (or 128212893095 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20001211320012 its reverse (21002311210002), we get a palindrome (41003522530014).

The spelling of 20001211320012 in words is "twenty trillion, one billion, two hundred eleven million, three hundred twenty thousand, twelve".