22021001210000 has 100 divisors (see below), whose sum is σ = 57416203755372. Its totient is φ = 8130831168000.

The previous prime is 22021001209997. The next prime is 22021001210009. The reversal of 22021001210000 is 1210012022.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 17294586072976 + 4726415137024 = 4158676^2 + 2174032^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (22021001210009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84566159 + ... + 84826158.

Almost surely, 2^{22021001210000} is an apocalyptic number.

22021001210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021001210000 is an abundant number, since it is smaller than the sum of its proper divisors (35395202545372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021001210000 is a wasteful number, since it uses less digits than its factorization.

22021001210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169392358 (or 169392337 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22021001210000 its reverse (1210012022), we get a palindrome (22022211222022).

The spelling of 22021001210000 in words is "twenty-two trillion, twenty-one billion, one million, two hundred ten thousand".