121001021002 has 32 divisors (see below), whose sum is σ = 188657349120. Its totient is φ = 58143666240.

The previous prime is 121001020997. The next prime is 121001021003. The reversal of 121001021002 is 200120100121.

It is a self number, because there is not a number n which added to its sum of digits gives 121001021002.

It is not an unprimeable number, because it can be changed into a prime (121001021003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5625873 + ... + 5647339.

It is an arithmetic number, because the mean of its divisors is an integer number (5895542160).

Almost surely, 2^121001021002 is an apocalyptic number.

121001021002 is a deficient number, since it is larger than the sum of its proper divisors (67656328118).

121001021002 is a wasteful number, since it uses less digits than its factorization.

121001021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22126.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121001021002 its reverse (200120100121), we get a palindrome (321121121123).

The spelling of 121001021002 in words is "one hundred twenty-one billion, one million, twenty-one thousand, two".