121121001002 has 4 divisors (see below), whose sum is σ = 181681501506. Its totient is φ = 60560500500.

The previous prime is 121121000993. The next prime is 121121001007. The reversal of 121121001002 is 200100121121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 120736095841 + 384905161 = 347471^2 + 19619^2 .

It is not an unprimeable number, because it can be changed into a prime (121121001007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30280250249 + ... + 30280250252.

Almost surely, 2^121121001002 is an apocalyptic number.

121121001002 is a deficient number, since it is larger than the sum of its proper divisors (60560500504).

121121001002 is an equidigital number, since it uses as much as digits as its factorization.

121121001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60560500503.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121121001002 its reverse (200100121121), we get a palindrome (321221122123).

The spelling of 121121001002 in words is "one hundred twenty-one billion, one hundred twenty-one million, one thousand, two".