1221202002 has 8 divisors (see below), whose sum is σ = 2442404016. Its totient is φ = 407067332.

The previous prime is 1221201979. The next prime is 1221202007. The reversal of 1221202002 is 2002021221.

It is a sphenic number, since it is the product of 3 distinct primes.

1221202002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1221202007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101766828 + ... + 101766839.

It is an arithmetic number, because the mean of its divisors is an integer number (305300502).

Almost surely, 2^1221202002 is an apocalyptic number.

1221202002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221202002 is a wasteful number, since it uses less digits than its factorization.

1221202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203533672.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1221202002 is about 34945.7007656164. The cubic root of 1221202002 is about 1068.8805370599.

Adding to 1221202002 its reverse (2002021221), we get a palindrome (3223223223).

The spelling of 1221202002 in words is "one billion, two hundred twenty-one million, two hundred two thousand, two".