121001011002 has 20 divisors (see below), whose sum is σ = 271131895386. Its totient is φ = 40333670280.

The previous prime is 121001010967. The next prime is 121001011057. The reversal of 121001011002 is 200110100121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62775803601 + 58225207401 = 250551^2 + 241299^2 .

It is a super-2 number, since 2×121001011002² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 373459749 + ... + 373460072.

Almost surely, 2^121001011002 is an apocalyptic number.

121001011002 is an abundant number, since it is smaller than the sum of its proper divisors (150130884384).

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

121001011002 is an equidigital number, since it uses as much as digits as its factorization.

121001011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746919835 (or 746919826 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121001011002 its reverse (200110100121), we get a palindrome (321111111123).

The spelling of 121001011002 in words is "one hundred twenty-one billion, one million, eleven thousand, two".