1221101010002 has 4 divisors (see below), whose sum is σ = 1831651515006. Its totient is φ = 610550505000.

The previous prime is 1221101009959. The next prime is 1221101010023. The reversal of 1221101010002 is 2000101011221.

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., 1209320295481 + 11780714521 = 1099691^2 + 108539^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305275252499 + ... + 305275252502.

Almost surely, 2^{1221101010002} is an apocalyptic number.

1221101010002 is a deficient number, since it is larger than the sum of its proper divisors (610550505004).

1221101010002 is an equidigital number, since it uses as much as digits as its factorization.

1221101010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610550505003.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1221101010002 its reverse (2000101011221), we get a palindrome (3221202021223).

The spelling of 1221101010002 in words is "one trillion, two hundred twenty-one billion, one hundred one million, ten thousand, two".