10221220001002 has 4 divisors (see below), whose sum is σ = 15331830001506. Its totient is φ = 5110610000500.

The previous prime is 10221220000969. The next prime is 10221220001033. The reversal of 10221220001002 is 20010002212201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9888326774041 + 332893226961 = 3144571^2 + 576969^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555305000249 + ... + 2555305000252.

Almost surely, 2^{10221220001002} is an apocalyptic number.

10221220001002 is a deficient number, since it is larger than the sum of its proper divisors (5110610000504).

10221220001002 is an equidigital number, since it uses as much as digits as its factorization.

10221220001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110610000503.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10221220001002 its reverse (20010002212201), we get a palindrome (30231222213203).

The spelling of 10221220001002 in words is "ten trillion, two hundred twenty-one billion, two hundred twenty million, one thousand, two".