10211221012 has 24 divisors (see below), whose sum is σ = 18114022080. Its totient is φ = 5036254080.

The previous prime is 10211220953. The next prime is 10211221049. The reversal of 10211221012 is 21012211201.

It is a junction number, because it is equal to n+sod(n) for n = 10211220983 and 10211221001.

It is a congruent number.

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, 29164 + ... + 145852.

It is an arithmetic number, because the mean of its divisors is an integer number (754750920).

Almost surely, 2^10211221012 is an apocalyptic number.

It is an amenable number.

10211221012 is a deficient number, since it is larger than the sum of its proper divisors (7902801068).

10211221012 is a wasteful number, since it uses less digits than its factorization.

10211221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116991 (or 116989 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10211221012 its reverse (21012211201), we get a palindrome (31223432213).

The spelling of 10211221012 in words is "ten billion, two hundred eleven million, two hundred twenty-one thousand, twelve".