20111022002 has 4 divisors (see below), whose sum is σ = 30166533006. Its totient is φ = 10055511000.

The previous prime is 20111021963. The next prime is 20111022007. The reversal of 20111022002 is 20022011102.

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., 19636697161 + 474324841 = 140131^2 + 21779^2 .

It is not an unprimeable number, because it can be changed into a prime (20111022007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027755499 + ... + 5027755502.

Almost surely, 2^20111022002 is an apocalyptic number.

20111022002 is a deficient number, since it is larger than the sum of its proper divisors (10055511004).

20111022002 is a wasteful number, since it uses less digits than its factorization.

20111022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055511003.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20111022002 its reverse (20022011102), we get a palindrome (40133033104).

It can be divided in two parts, 2011102 and 2002, that multiplied together give a palindrome (4026226204).

The spelling of 20111022002 in words is "twenty billion, one hundred eleven million, twenty-two thousand, two".