20011121220010 has 16 divisors (see below), whose sum is σ = 36040707496872. Its totient is φ = 7999850865600.

The previous prime is 20011121219993. The next prime is 20011121220053. The reversal of 20011121220010 is 1002212111002.

It can be written as a sum of positive squares in 4 ways, for example, as 15913804402521 + 4097316817489 = 3989211^2 + 2024183^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574684521 + ... + 574719340.

Almost surely, 2^{20011121220010} is an apocalyptic number.

20011121220010 is a deficient number, since it is larger than the sum of its proper divisors (16029586276862).

20011121220010 is a wasteful number, since it uses less digits than its factorization.

20011121220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149405609.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20011121220010 its reverse (1002212111002), we get a palindrome (21013333331012).

The spelling of 20011121220010 in words is "twenty trillion, eleven billion, one hundred twenty-one million, two hundred twenty thousand, ten".