201021002010 has 48 divisors (see below), whose sum is σ = 540677184840. Its totient is φ = 51757130880.

The previous prime is 201021001997. The next prime is 201021002053. The reversal of 201021002010 is 10200120102.

It can be written as a sum of positive squares in 4 ways, for example, as 145959910209 + 55061091801 = 382047^2 + 234651^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201021001983 and 201021002001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38507161 + ... + 38512380.

Almost surely, 2^201021002010 is an apocalyptic number.

201021002010 is an abundant number, since it is smaller than the sum of its proper divisors (339656182830).

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

201021002010 is a wasteful number, since it uses less digits than its factorization.

201021002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77019583 (or 77019580 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201021002010 its reverse (10200120102), we get a palindrome (211221122112).

The spelling of 201021002010 in words is "two hundred one billion, twenty-one million, two thousand, ten".