21000010222012 has 12 divisors (see below), whose sum is σ = 36755174388240. Its totient is φ = 10498531825376.

The previous prime is 21000010222007. The next prime is 21000010222049. The reversal of 21000010222012 is 21022201000012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21000010221983 and 21000010222001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368289337 + ... + 368346352.

It is an arithmetic number, because the mean of its divisors is an integer number (3062931199020).

Almost surely, 2^{21000010222012} is an apocalyptic number.

It is an amenable number.

21000010222012 is a deficient number, since it is larger than the sum of its proper divisors (15755164166228).

21000010222012 is a wasteful number, since it uses less digits than its factorization.

21000010222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736642820 (or 736642818 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21000010222012 its reverse (21022201000012), we get a palindrome (42022211222024).

The spelling of 21000010222012 in words is "twenty-one trillion, ten million, two hundred twenty-two thousand, twelve".