201001210120 has 32 divisors (see below), whose sum is σ = 453594749400. Its totient is φ = 80161901568.

The previous prime is 201001210079. The next prime is 201001210129. The reversal of 201001210120 is 21012100102.

It can be written as a sum of positive squares in 4 ways, for example, as 177461672644 + 23539537476 = 421262^2 + 153426^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 201001210097 and 201001210106.

It is not an unprimeable number, because it can be changed into a prime (201001210129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7442055 + ... + 7469014.

Almost surely, 2^201001210120 is an apocalyptic number.

201001210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001210120 is an abundant number, since it is smaller than the sum of its proper divisors (252593539280).

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

201001210120 is a wasteful number, since it uses less digits than its factorization.

201001210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14911417 (or 14911413 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201001210120 its reverse (21012100102), we get a palindrome (222013310222).

The spelling of 201001210120 in words is "two hundred one billion, one million, two hundred ten thousand, one hundred twenty".