201001221121010 has 32 divisors (see below), whose sum is σ = 365579060600880. Its totient is φ = 79561398546432.

The previous prime is 201001221121009. The next prime is 201001221121067. The reversal of 201001221121010 is 10121122100102.

It can be written as a sum of positive squares in 8 ways, for example, as 138415860310729 + 62585360810281 = 11765027^2 + 7911091^2 .

It is a Curzon 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, 5746619 + ... + 20857278.

Almost surely, 2^{201001221121010} is an apocalyptic number.

201001221121010 is a deficient number, since it is larger than the sum of its proper divisors (164577839479870).

201001221121010 is a wasteful number, since it uses less digits than its factorization.

201001221121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26611790.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201001221121010 its reverse (10121122100102), we get a palindrome (211122343221112).

The spelling of 201001221121010 in words is "two hundred one trillion, one billion, two hundred twenty-one million, one hundred twenty-one thousand, ten".