1221202110002 has 16 divisors (see below), whose sum is σ = 2094177825792. Its totient is φ = 523200209280.

The previous prime is 1221202110001. The next prime is 1221202110061. The reversal of 1221202110002 is 2000112021221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1221202110001) 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, 14299538 + ... + 14384685.

It is an arithmetic number, because the mean of its divisors is an integer number (130886114112).

Almost surely, 2^{1221202110002} is an apocalyptic number.

1221202110002 is a deficient number, since it is larger than the sum of its proper divisors (872975715790).

1221202110002 is a wasteful number, since it uses less digits than its factorization.

1221202110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28687273.

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

Adding to 1221202110002 its reverse (2000112021221), we get a palindrome (3221314131223).

The spelling of 1221202110002 in words is "one trillion, two hundred twenty-one billion, two hundred two million, one hundred ten thousand, two".