121001221222002 has 64 divisors (see below), whose sum is σ = 294825310876800. Its totient is φ = 36480909608640.

The previous prime is 121001221221983. The next prime is 121001221222073. The reversal of 121001221222002 is 200222122100121.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 516902677 + ... + 517136712.

It is an arithmetic number, because the mean of its divisors is an integer number (4606645482450).

Almost surely, 2^{121001221222002} is an apocalyptic number.

121001221222002 is an abundant number, since it is smaller than the sum of its proper divisors (173824089654798).

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

121001221222002 is a wasteful number, since it uses less digits than its factorization.

121001221222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034039608 (or 1034039602 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121001221222002 its reverse (200222122100121), we get a palindrome (321223343322123).

The spelling of 121001221222002 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-one million, two hundred twenty-two thousand, two".