20011122002 has 4 divisors (see below), whose sum is σ = 30016683006. Its totient is φ = 10005561000.

The previous prime is 20011121987. The next prime is 20011122011. The reversal of 20011122002 is 20022111002.

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., 12358546561 + 7652575441 = 111169^2 + 87479^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002780499 + ... + 5002780502.

Almost surely, 2^20011122002 is an apocalyptic number.

20011122002 is a deficient number, since it is larger than the sum of its proper divisors (10005561004).

20011122002 is a wasteful number, since it uses less digits than its factorization.

20011122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005561003.

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

Adding to 20011122002 its reverse (20022111002), we get a palindrome (40033233004).

The spelling of 20011122002 in words is "twenty billion, eleven million, one hundred twenty-two thousand, two".