21012121010222 has 8 divisors (see below), whose sum is σ = 31518995025000. Its totient is φ = 10505789335224.

The previous prime is 21012121010171. The next prime is 21012121010311. The reversal of 21012121010222 is 22201012121012.

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 21012121010222.

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, 135488072 + ... + 135643067.

It is an arithmetic number, because the mean of its divisors is an integer number (3939874378125).

Almost surely, 2^{21012121010222} is an apocalyptic number.

21012121010222 is a deficient number, since it is larger than the sum of its proper divisors (10506874014778).

21012121010222 is a wasteful number, since it uses less digits than its factorization.

21012121010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271169890.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012121010222 its reverse (22201012121012), we get a palindrome (43213133131234).

The spelling of 21012121010222 in words is "twenty-one trillion, twelve billion, one hundred twenty-one million, ten thousand, two hundred twenty-two".