21226561466002 has 16 divisors (see below), whose sum is σ = 33715899411480. Its totient is φ = 9988044081408.

The previous prime is 21226561465997. The next prime is 21226561466003. The reversal of 21226561466002 is 20066416562212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14836894793161 + 6389666672841 = 3851869^2 + 2527779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21226561466002.

It is not an unprimeable number, because it can be changed into a prime (21226561466003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28565913 + ... + 29299564.

Almost surely, 2^{21226561466002} is an apocalyptic number.

21226561466002 is a deficient number, since it is larger than the sum of its proper divisors (12489337945478).

21226561466002 is a wasteful number, since it uses less digits than its factorization.

21226561466002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57876285.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 21226561466002 in words is "twenty-one trillion, two hundred twenty-six billion, five hundred sixty-one million, four hundred sixty-six thousand, two".