1221311032002 has 32 divisors (see below), whose sum is σ = 2714774060160. Its totient is φ = 406991245680.

The previous prime is 1221311031989. The next prime is 1221311032031. The reversal of 1221311032002 is 2002301131221.

1221311032002 is a `hidden beast` number, since 12 + 21 + 311 + 0 + 320 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925649 + ... + 3316932.

It is an arithmetic number, because the mean of its divisors is an integer number (84836689380).

Almost surely, 2^{1221311032002} is an apocalyptic number.

1221311032002 is an abundant number, since it is smaller than the sum of its proper divisors (1493463028158).

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

1221311032002 is a wasteful number, since it uses less digits than its factorization.

1221311032002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246215 (or 6246209 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1221311032002 its reverse (2002301131221), we get a palindrome (3223612163223).

The spelling of 1221311032002 in words is "one trillion, two hundred twenty-one billion, three hundred eleven million, thirty-two thousand, two".