20012001011266 has 32 divisors (see below), whose sum is σ = 33125278209408. Its totient is φ = 8991693661440.

The previous prime is 20012001011129. The next prime is 20012001011267. The reversal of 20012001011266 is 66211010021002.

It is a super-2 number, since 2×20012001011266² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20012001011267) 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, 9863446 + ... + 11718001.

It is an arithmetic number, because the mean of its divisors is an integer number (1035164944044).

Almost surely, 2^{20012001011266} is an apocalyptic number.

20012001011266 is a deficient number, since it is larger than the sum of its proper divisors (13113277198142).

20012001011266 is a wasteful number, since it uses less digits than its factorization.

20012001011266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21581946.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20012001011266 its reverse (66211010021002), we get a palindrome (86223011032268).

The spelling of 20012001011266 in words is "twenty trillion, twelve billion, one million, eleven thousand, two hundred sixty-six".