201012212121020 has 48 divisors (see below), whose sum is σ = 436683245916960. Its totient is φ = 77632028173056.

The previous prime is 201012212121013. The next prime is 201012212121037. The reversal of 201012212121020 is 20121212210102.

It is a self number, because there is not a number n which added to its sum of digits gives 201012212121020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256666754 + ... + 257448726.

It is an arithmetic number, because the mean of its divisors is an integer number (9097567623270).

Almost surely, 2^{201012212121020} is an apocalyptic number.

201012212121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201012212121020 is an abundant number, since it is smaller than the sum of its proper divisors (235671033795940).

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

201012212121020 is a wasteful number, since it uses less digits than its factorization.

201012212121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225214 (or 1225212 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201012212121020 its reverse (20121212210102), we get a palindrome (221133424331122).

The spelling of 201012212121020 in words is "two hundred one trillion, twelve billion, two hundred twelve million, one hundred twenty-one thousand, twenty".