1221102122002 has 16 divisors (see below), whose sum is σ = 2124561476160. Its totient is φ = 515518592688.

The previous prime is 1221102121969. The next prime is 1221102122021. The reversal of 1221102122002 is 2002212011221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650906377 + ... + 650908252.

It is an arithmetic number, because the mean of its divisors is an integer number (132785092260).

Almost surely, 2^{1221102122002} is an apocalyptic number.

1221102122002 is a deficient number, since it is larger than the sum of its proper divisors (903459354158).

1221102122002 is a wasteful number, since it uses less digits than its factorization.

1221102122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301814705.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221102122002 its reverse (2002212011221), we get a palindrome (3223314133223).

The spelling of 1221102122002 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, two".