121000010002 has 16 divisors (see below), whose sum is σ = 187921583640. Its totient is φ = 58363103232.

The previous prime is 121000009997. The next prime is 121000010009. The reversal of 121000010002 is 200010000121.

It can be written as a sum of positive squares in 4 ways, for example, as 120380547681 + 619462321 = 346959^2 + 24889^2 .

It is not an unprimeable number, because it can be changed into a prime (121000010009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837813 + ... + 971560.

Almost surely, 2^121000010002 is an apocalyptic number.

121000010002 is a deficient number, since it is larger than the sum of its proper divisors (66921573638).

121000010002 is a wasteful number, since it uses less digits than its factorization.

121000010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810557.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 121000010002 its reverse (200010000121), we get a palindrome (321010010123).

The spelling of 121000010002 in words is "one hundred twenty-one billion, ten thousand, two".