1021221102002 has 4 divisors (see below), whose sum is σ = 1531831653006. Its totient is φ = 510610551000.

The previous prime is 1021221101963. The next prime is 1021221102019. The reversal of 1021221102002 is 2002011221201.

1021221102002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 886156766881 + 135064335121 = 941359^2 + 367511^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255305275499 + ... + 255305275502.

Almost surely, 2^{1021221102002} is an apocalyptic number.

1021221102002 is a deficient number, since it is larger than the sum of its proper divisors (510610551004).

1021221102002 is an equidigital number, since it uses as much as digits as its factorization.

1021221102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510610551003.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021221102002 its reverse (2002011221201), we get a palindrome (3023232323203).

The spelling of 1021221102002 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred two thousand, two".