20121001002202 has 4 divisors (see below), whose sum is σ = 30181501503306. Its totient is φ = 10060500501100.

The previous prime is 20121001002197. The next prime is 20121001002209. The reversal of 20121001002202 is 20220010012102.

It is a happy number.

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., 19376820451921 + 744180550281 = 4401911^2 + 862659^2 .

It is a super-2 number, since 2×20121001002202² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121001002209) by changing a digit.

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 as a sum of consecutive naturals, namely, 5030250250549 + ... + 5030250250552.

Almost surely, 2^{20121001002202} is an apocalyptic number.

20121001002202 is a deficient number, since it is larger than the sum of its proper divisors (10060500501104).

20121001002202 is a wasteful number, since it uses less digits than its factorization.

20121001002202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060500501103.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20121001002202 its reverse (20220010012102), we get a palindrome (40341011014304).

The spelling of 20121001002202 in words is "twenty trillion, one hundred twenty-one billion, one million, two thousand, two hundred two".