20100021212002 has 4 divisors (see below), whose sum is σ = 30150031818006. Its totient is φ = 10050010606000.

The previous prime is 20100021211969. The next prime is 20100021212027. The reversal of 20100021212002 is 20021212000102.

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., 19727641779561 + 372379432441 = 4441581^2 + 610229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025005302999 + ... + 5025005303002.

Almost surely, 2^{20100021212002} is an apocalyptic number.

20100021212002 is a deficient number, since it is larger than the sum of its proper divisors (10050010606004).

20100021212002 is a wasteful number, since it uses less digits than its factorization.

20100021212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050010606003.

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

Adding to 20100021212002 its reverse (20021212000102), we get a palindrome (40121233212104).

The spelling of 20100021212002 in words is "twenty trillion, one hundred billion, twenty-one million, two hundred twelve thousand, two".