20011111021012 has 24 divisors (see below), whose sum is σ = 35800411336704. Its totient is φ = 9782849121312.

The previous prime is 20011111020973. The next prime is 20011111021039. The reversal of 20011111021012 is 21012011111002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20011111020983 and 20011111021001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53193748 + ... + 53568619.

It is an arithmetic number, because the mean of its divisors is an integer number (1491683805696).

Almost surely, 2^{20011111021012} is an apocalyptic number.

It is an amenable number.

20011111021012 is a deficient number, since it is larger than the sum of its proper divisors (15789300315692).

20011111021012 is a wasteful number, since it uses less digits than its factorization.

20011111021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106763415 (or 106763413 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20011111021012 its reverse (21012011111002), we get a palindrome (41023122132014).

The spelling of 20011111021012 in words is "twenty trillion, eleven billion, one hundred eleven million, twenty-one thousand, twelve".