20011202111212 has 144 divisors (see below), whose sum is σ = 40908035266560. Its totient is φ = 8533111152384.

The previous prime is 20011202111203. The next prime is 20011202111311. The reversal of 20011202111212 is 21211120211002.

It is a super-2 number, since 2×20011202111212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 360618933 + ... + 360674419.

It is an arithmetic number, because the mean of its divisors is an integer number (284083578240).

Almost surely, 2^{20011202111212} is an apocalyptic number.

It is an amenable number.

20011202111212 is an abundant number, since it is smaller than the sum of its proper divisors (20896833155348).

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

20011202111212 is a wasteful number, since it uses less digits than its factorization.

20011202111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56232 (or 56217 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20011202111212 its reverse (21211120211002), we get a palindrome (41222322322214).

The spelling of 20011202111212 in words is "twenty trillion, eleven billion, two hundred two million, one hundred eleven thousand, two hundred twelve".