201001212222100 has 36 divisors (see below), whose sum is σ = 440491171440348. Its totient is φ = 79604440480000.

The previous prime is 201001212222073. The next prime is 201001212222101. The reversal of 201001212222100 is 1222212100102.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 42788788846596 + 158212423375504 = 6541314^2 + 12578252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001212222101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9950544961 + ... + 9950565160.

It is an arithmetic number, because the mean of its divisors is an integer number (12235865873343).

Almost surely, 2^{201001212222100} is an apocalyptic number.

201001212222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001212222100 is an abundant number, since it is smaller than the sum of its proper divisors (239489959218248).

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

201001212222100 is a wasteful number, since it uses less digits than its factorization.

201001212222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19901110236 (or 19901110229 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201001212222100 its reverse (1222212100102), we get a palindrome (202223424322202).

The spelling of 201001212222100 in words is "two hundred one trillion, one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred".