212201121100020 has 96 divisors (see below), whose sum is σ = 640009476392832. Its totient is φ = 52222572691968.

The previous prime is 212201121099973. The next prime is 212201121100021. The reversal of 212201121100020 is 20001121102212.

It is a super-2 number, since 2×212201121100020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201121100021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26546427 + ... + 33602306.

It is an arithmetic number, because the mean of its divisors is an integer number (6666765379092).

Almost surely, 2^{212201121100020} is an apocalyptic number.

212201121100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212201121100020 is an abundant number, since it is smaller than the sum of its proper divisors (427808355292812).

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

212201121100020 is a wasteful number, since it uses less digits than its factorization.

212201121100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60153281 (or 60153279 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212201121100020 its reverse (20001121102212), we get a palindrome (232202242202232).

The spelling of 212201121100020 in words is "two hundred twelve trillion, two hundred one billion, one hundred twenty-one million, one hundred thousand, twenty".