21012012020222 has 8 divisors (see below), whose sum is σ = 32534728289472. Its totient is φ = 10167102590400.

The previous prime is 21012012020143. The next prime is 21012012020257. The reversal of 21012012020222 is 22202021021012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21012012020222.

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, 169451709779 + ... + 169451709902.

It is an arithmetic number, because the mean of its divisors is an integer number (4066841036184).

Almost surely, 2^{21012012020222} is an apocalyptic number.

21012012020222 is a deficient number, since it is larger than the sum of its proper divisors (11522716269250).

21012012020222 is a wasteful number, since it uses less digits than its factorization.

21012012020222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338903419714.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21012012020222 its reverse (22202021021012), we get a palindrome (43214033041234).

The spelling of 21012012020222 in words is "twenty-one trillion, twelve billion, twelve million, twenty thousand, two hundred twenty-two".