20101212210020 has 24 divisors (see below), whose sum is σ = 42212635080000. Its totient is φ = 8040467848032.

The previous prime is 20101212210019. The next prime is 20101212210043. The reversal of 20101212210020 is 2001221210102.

It is a junction number, because it is equal to n+sod(n) for n = 20101212209977 and 20101212210004.

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, 13410281 + ... + 14833679.

It is an arithmetic number, because the mean of its divisors is an integer number (1758859795000).

Almost surely, 2^{20101212210020} is an apocalyptic number.

20101212210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101212210020 is an abundant number, since it is smaller than the sum of its proper divisors (22111422869980).

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

20101212210020 is a wasteful number, since it uses less digits than its factorization.

20101212210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129507 (or 2129505 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20101212210020 its reverse (2001221210102), we get a palindrome (22102433420122).

The spelling of 20101212210020 in words is "twenty trillion, one hundred one billion, two hundred twelve million, two hundred ten thousand, twenty".