20011121097 has 16 divisors (see below), whose sum is σ = 29109749760. Its totient is φ = 12126842000.

The previous prime is 20011121077. The next prime is 20011121101. The reversal of 20011121097 is 79012111002.

It is a cyclic number.

It is not a de Polignac number, because 20011121097 - 2⁸ = 20011120841 is a prime.

It is a super-3 number, since 3×20011121097³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20011121017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473104 + ... + 513662.

It is an arithmetic number, because the mean of its divisors is an integer number (1819359360).

Almost surely, 2^20011121097 is an apocalyptic number.

It is an amenable number.

20011121097 is a deficient number, since it is larger than the sum of its proper divisors (9098628663).

20011121097 is a wasteful number, since it uses less digits than its factorization.

20011121097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55524.

The product of its (nonzero) digits is 252, while the sum is 24.

Adding to 20011121097 its reverse (79012111002), we get a palindrome (99023232099).

The spelling of 20011121097 in words is "twenty billion, eleven million, one hundred twenty-one thousand, ninety-seven".