20111210011020 has 96 divisors (see below), whose sum is σ = 58257833457600. Its totient is φ = 5177643254784.

The previous prime is 20111210010949. The next prime is 20111210011091. The reversal of 20111210011020 is 2011001211102.

It is an interprime number because it is at equal distance from previous prime (20111210010949) and next prime (20111210011091).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20111210010987 and 20111210011005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21531066 + ... + 22445694.

It is an arithmetic number, because the mean of its divisors is an integer number (606852431850).

Almost surely, 2^{20111210011020} is an apocalyptic number.

20111210011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111210011020 is an abundant number, since it is smaller than the sum of its proper divisors (38146623446580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111210011020 is a wasteful number, since it uses less digits than its factorization.

20111210011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927307 (or 927305 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111210011020 its reverse (2011001211102), we get a palindrome (22122211222122).

The spelling of 20111210011020 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, eleven thousand, twenty".