121221111002 has 8 divisors (see below), whose sum is σ = 181835609556. Its totient is φ = 60609241152.

The previous prime is 121221110993. The next prime is 121221111043. The reversal of 121221111002 is 200111122121.

It can be written as a sum of positive squares in 2 ways, for example, as 120687454801 + 533656201 = 347401^2 + 23101^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537533 + ... + 728960.

Almost surely, 2^121221111002 is an apocalyptic number.

121221111002 is a deficient number, since it is larger than the sum of its proper divisors (60614498554).

121221111002 is a wasteful number, since it uses less digits than its factorization.

121221111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314352.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221111002 its reverse (200111122121), we get a palindrome (321332233123).

The spelling of 121221111002 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, two".